Here is what I get when I retrieved the logs using the message suggested above.
sudo docker exec nextcloud-aio-nextcloud tail data/nextcloud.log
{"reqId":"53wgMou8ymuoV8R4OJmQ","level":3,"time":"2025-04-06T16:43:04+00:00","remoteAddr":"69.14.202.59","user":"--","app":"PHP","method":"GET","url":"/apps/richdocuments/settings/fonts/Pacifico-Regular.ttf","message":"file_get_contents(/mnt/ncdata/appdata_ocpfhjyah3mk/richdocuments/fonts/Pacifico-Regular.ttf): Failed to open stream: Permission denied at /var/www/html/lib/private/Files/Storage/Local.php#296","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","data":{"app":"PHP"}}
{"reqId":"53wgMou8ymuoV8R4OJmQ","level":3,"time":"2025-04-06T16:43:04+00:00","remoteAddr":"69.14.202.59","user":"--","app":"index","method":"GET","url":"/apps/richdocuments/settings/fonts/Pacifico-Regular.ttf","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/var/www/html/lib/private/Files/SimpleFS/SimpleFile.php","line":55,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->","args":[]},{"file":"/var/www/html/custom_apps/richdocuments/lib/Controller/SettingsController.php","line":362,"function":"getContent","class":"OC\\Files\\SimpleFS\\SimpleFile","type":"->","args":[]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":208,"function":"getFontFile","class":"OCA\\Richdocuments\\Controller\\SettingsController","type":"->","args":["Pacifico-Regular.ttf"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":303,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Richdocuments\\Controller\\SettingsController","getFontFile",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"name":"Pacifico-Regular.ttf","_route":"richdocuments.settings.getfontfile"}]},{"file":"/var/www/html/lib/base.php","line":1010,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/richdocuments/settings/fonts/Pacifico-Regular.ttf"]},{"file":"/var/www/html/index.php","line":24,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/lib/private/Files/Node/File.php","Line":35,"message":"","exception":{},"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"}}
{"reqId":"UwgmxFbZVOsuZ5R28JFR","level":3,"time":"2025-04-06T16:43:05+00:00","remoteAddr":"69.14.202.59","user":"--","app":"PHP","method":"GET","url":"/apps/richdocuments/settings/fonts/PlayfairDisplay-wght.ttf","message":"file_get_contents(/mnt/ncdata/appdata_ocpfhjyah3mk/richdocuments/fonts/PlayfairDisplay-wght.ttf): Failed to open stream: Permission denied at /var/www/html/lib/private/Files/Storage/Local.php#296","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","data":{"app":"PHP"}}
{"reqId":"UwgmxFbZVOsuZ5R28JFR","level":3,"time":"2025-04-06T16:43:05+00:00","remoteAddr":"69.14.202.59","user":"--","app":"index","method":"GET","url":"/apps/richdocuments/settings/fonts/PlayfairDisplay-wght.ttf","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/var/www/html/lib/private/Files/SimpleFS/SimpleFile.php","line":55,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->","args":[]},{"file":"/var/www/html/custom_apps/richdocuments/lib/Controller/SettingsController.php","line":362,"function":"getContent","class":"OC\\Files\\SimpleFS\\SimpleFile","type":"->","args":[]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":208,"function":"getFontFile","class":"OCA\\Richdocuments\\Controller\\SettingsController","type":"->","args":["PlayfairDisplay-wght.ttf"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":303,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Richdocuments\\Controller\\SettingsController","getFontFile",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"name":"PlayfairDisplay-wght.ttf","_route":"richdocuments.settings.getfontfile"}]},{"file":"/var/www/html/lib/base.php","line":1010,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/richdocuments/settings/fonts/PlayfairDisplay-wght.ttf"]},{"file":"/var/www/html/index.php","line":24,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/lib/private/Files/Node/File.php","Line":35,"message":"","exception":{},"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"}}
{"reqId":"qiEZ3vqOYG8FsE4jgn35","level":3,"time":"2025-04-06T16:43:05+00:00","remoteAddr":"69.14.202.59","user":"--","app":"PHP","method":"GET","url":"/apps/richdocuments/settings/fonts/Roboto-wdtg-wght.ttf","message":"file_get_contents(/mnt/ncdata/appdata_ocpfhjyah3mk/richdocuments/fonts/Roboto-wdtg-wght.ttf): Failed to open stream: Permission denied at /var/www/html/lib/private/Files/Storage/Local.php#296","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","data":{"app":"PHP"}}
{"reqId":"qiEZ3vqOYG8FsE4jgn35","level":3,"time":"2025-04-06T16:43:05+00:00","remoteAddr":"69.14.202.59","user":"--","app":"index","method":"GET","url":"/apps/richdocuments/settings/fonts/Roboto-wdtg-wght.ttf","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/var/www/html/lib/private/Files/SimpleFS/SimpleFile.php","line":55,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->","args":[]},{"file":"/var/www/html/custom_apps/richdocuments/lib/Controller/SettingsController.php","line":362,"function":"getContent","class":"OC\\Files\\SimpleFS\\SimpleFile","type":"->","args":[]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":208,"function":"getFontFile","class":"OCA\\Richdocuments\\Controller\\SettingsController","type":"->","args":["Roboto-wdtg-wght.ttf"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":303,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Richdocuments\\Controller\\SettingsController","getFontFile",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"name":"Roboto-wdtg-wght.ttf","_route":"richdocuments.settings.getfontfile"}]},{"file":"/var/www/html/lib/base.php","line":1010,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/richdocuments/settings/fonts/Roboto-wdtg-wght.ttf"]},{"file":"/var/www/html/index.php","line":24,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/lib/private/Files/Node/File.php","Line":35,"message":"","exception":{},"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"}}
{"reqId":"CtS8b7j4sV2Z2pkVijxq","level":3,"time":"2025-04-06T16:43:05+00:00","remoteAddr":"69.14.202.59","user":"--","app":"PHP","method":"GET","url":"/apps/richdocuments/settings/fonts/RobotoMono-wght.ttf","message":"file_get_contents(/mnt/ncdata/appdata_ocpfhjyah3mk/richdocuments/fonts/RobotoMono-wght.ttf): Failed to open stream: Permission denied at /var/www/html/lib/private/Files/Storage/Local.php#296","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","data":{"app":"PHP"}}
{"reqId":"CtS8b7j4sV2Z2pkVijxq","level":3,"time":"2025-04-06T16:43:05+00:00","remoteAddr":"69.14.202.59","user":"--","app":"index","method":"GET","url":"/apps/richdocuments/settings/fonts/RobotoMono-wght.ttf","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/var/www/html/lib/private/Files/SimpleFS/SimpleFile.php","line":55,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->","args":[]},{"file":"/var/www/html/custom_apps/richdocuments/lib/Controller/SettingsController.php","line":362,"function":"getContent","class":"OC\\Files\\SimpleFS\\SimpleFile","type":"->","args":[]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":208,"function":"getFontFile","class":"OCA\\Richdocuments\\Controller\\SettingsController","type":"->","args":["RobotoMono-wght.ttf"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":303,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Richdocuments\\Controller\\SettingsController","getFontFile",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"name":"RobotoMono-wght.ttf","_route":"richdocuments.settings.getfontfile"}]},{"file":"/var/www/html/lib/base.php","line":1010,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/richdocuments/settings/fonts/RobotoMono-wght.ttf"]},{"file":"/var/www/html/index.php","line":24,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/lib/private/Files/Node/File.php","Line":35,"message":"","exception":{},"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"}}
{"reqId":"PHRf50iUZocf5TKKusyl","level":3,"time":"2025-04-06T16:43:06+00:00","remoteAddr":"69.14.202.59","user":"--","app":"PHP","method":"GET","url":"/apps/richdocuments/settings/fonts/Spectral-Regular.ttf","message":"file_get_contents(/mnt/ncdata/appdata_ocpfhjyah3mk/richdocuments/fonts/Spectral-Regular.ttf): Failed to open stream: Permission denied at /var/www/html/lib/private/Files/Storage/Local.php#296","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","data":{"app":"PHP"}}
{"reqId":"PHRf50iUZocf5TKKusyl","level":3,"time":"2025-04-06T16:43:06+00:00","remoteAddr":"69.14.202.59","user":"--","app":"index","method":"GET","url":"/apps/richdocuments/settings/fonts/Spectral-Regular.ttf","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"COOLWSD HTTP Agent 24.04.12.4","version":"30.0.8.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/var/www/html/lib/private/Files/SimpleFS/SimpleFile.php","line":55,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->","args":[]},{"file":"/var/www/html/custom_apps/richdocuments/lib/Controller/SettingsController.php","line":362,"function":"getContent","class":"OC\\Files\\SimpleFS\\SimpleFile","type":"->","args":[]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":208,"function":"getFontFile","class":"OCA\\Richdocuments\\Controller\\SettingsController","type":"->","args":["Spectral-Regular.ttf"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":114,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":161,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Richdocuments\\Controller\\SettingsController"},"getFontFile"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":303,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Richdocuments\\Controller\\SettingsController","getFontFile",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"name":"Spectral-Regular.ttf","_route":"richdocuments.settings.getfontfile"}]},{"file":"/var/www/html/lib/base.php","line":1010,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/richdocuments/settings/fonts/Spectral-Regular.ttf"]},{"file":"/var/www/html/index.php","line":24,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/lib/private/Files/Node/File.php","Line":35,"message":"","exception":{},"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"}}