In nextcloud.log there are two entries showing where it fails on:
```
{"reqId":"…VlwcAaNTr09VSoSSGC08","level":4,"time":"2026-06-10T08:02:07+00:00","remoteAddr":"x.x.x.x","user":"--","app":"no app in context","method":"GET","url":"/index.php/204","scriptName":"/index.php","message":"Could not boot onlyoffice: Call to undefined method OC\\Server::getUserSession()","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/34.0.0","version":"34.0.0.12","exception":{"Exception":"Error","Message":"Call to undefined method OC\\Server::getUserSession()","Code":0,"Trace":[{"file":"/nextcloud/apps2/onlyoffice/lib/AppInfo/Application.php","line":142,"function":"isUserAllowedToUse","class":"OCA\\Onlyoffice\\AppConfig","type":"->","args":[]},{"file":"/nextcloud/lib/private/AppFramework/Bootstrap/FunctionInjector.php","line":26,"function":"{closure:OCA\\Onlyoffice\\AppInfo\\Application::boot():139}","class":"OCA\\Onlyoffice\\AppInfo\\Application","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/nextcloud/lib/private/AppFramework/Bootstrap/BootContext.php","line":33,"function":"injectFn","class":"OC\\AppFramework\\Bootstrap\\FunctionInjector","type":"->","args":[{"__class__":"Closure"}]},{"file":"/nextcloud/apps2/onlyoffice/lib/AppInfo/Application.php","line":139,"function":"injectFn","class":"OC\\AppFramework\\Bootstrap\\BootContext","type":"->","args":[{"__class__":"Closure"}]},{"file":"/nextcloud/lib/private/AppFramework/Bootstrap/Coordinator.php","line":167,"function":"boot","class":"OCA\\Onlyoffice\\AppInfo\\Application","type":"->","args":[{"__class__":"OC\\AppFramework\\Bootstrap\\BootContext"}]},{"file":"/nextcloud/lib/private/App/AppManager.php","line":497,"function":"bootApp","class":"OC\\AppFramework\\Bootstrap\\Coordinator","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/nextcloud/lib/private/App/AppManager.php","line":290,"function":"loadApp","class":"OC\\App\\AppManager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/nextcloud/lib/base.php","line":1157,"function":"loadApps","class":"OC\\App\\AppManager","type":"->","args":[]},{"file":"/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/nextcloud/apps2/onlyoffice/lib/AppConfig.php","Line":1215,"message":"Could not boot onlyoffice: Call to undefined method OC\\Server::getUserSession()","exception":"{\"class\":\"Error\",\"message\":\"Call to undefined method OC\\Server::getUserSession()\",\"code\":0,\"file\":\"/nextcloud/apps2/onlyoffice/lib/AppConfig.php:1215\",\"trace\":\"#0 /nextcloud/apps2/onlyoffice/lib/AppInfo/Application.php(142): OCA\\Onlyoffice\\AppConfig->isUserAllowedToUse()\\n#1 /nextcloud/lib/private/AppFramework/Bootstrap/FunctionInjector.php(26): OCA\\Onlyoffice\\AppInfo\\Application->{closure:OCA\\Onlyoffice\\AppInfo\\Application::boot():139}(Object(OC\\Files\\Template\\TemplateManager), Object(OC\\L10N\\LazyL10N), 'onlyoffice')\\n#2 /nextcloud/lib/private/AppFramework/Bootstrap/BootContext.php(33): OC\\AppFramework\\Bootstrap\\FunctionInjector->injectFn(Object(Closure))\\n#3 /nextcloud/apps2/onlyoffice/lib/AppInfo/Application.php(139): OC\\AppFramework\\Bootstrap\\BootContext->injectFn(Object(Closure))\\n#4 /nextcloud/lib/private/AppFramework/Bootstrap/Coordinator.php(167): OCA\\Onlyoffice\\AppInfo\\Application->boot(Object(OC\\AppFramework\\Bootstrap\\BootContext))\\n#5 /nextcloud/lib/private/App/AppManager.php(497): OC\\AppFramework\\Bootstrap\\Coordinator->bootApp('onlyoffice')\\n#6 /nextcloud/lib/private/App/AppManager.php(290): OC\\App\\AppManager->loadApp('onlyoffice')\\n#7 /nextcloud/lib/base.php(1157): OC\\App\\AppManager->loadApps()\\n#8 /nextcloud/index.php(25): OC::handleRequest()\\n#9 {main}\"}","CustomMessage":"Could not boot onlyoffice: Call to undefined method OC\\Server::getUserSession()"}}
{"reqId":"tC1Tvh9nMs15Yi4wG1ns","level":4,"time":"2026-06-10T08:02:07+00:00","remoteAddr":"x.x.x.x","user":"--","app":"no app in context","method":"GET","url":"/index.php/204","scriptName":"/index.php","message":"Could not boot onlyoffice: Call to undefined method OC\\Server::getUserSession()","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/34.0.0","version":"34.0.0.12","exception":{"Exception":"Error","Message":"Call to undefined method OC\\Server::getUserSession()","Code":0,"Trace":[{"file":"/nextcloud/apps2/onlyoffice/lib/AppInfo/Application.php","line":142,"function":"isUserAllowedToUse","class":"OCA\\Onlyoffice\\AppConfig","type":"->","args":[]},{"file":"/nextcloud/lib/private/AppFramework/Bootstrap/FunctionInjector.php","line":26,"function":"{closure:OCA\\Onlyoffice\\AppInfo\\Application::boot():139}","class":"OCA\\Onlyoffice\\AppInfo\\Application","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/nextcloud/lib/private/AppFramework/Bootstrap/BootContext.php","line":33,"function":"injectFn","class":"OC\\AppFramework\\Bootstrap\\FunctionInjector","type":"->","args":[{"__class__":"Closure"}]},{"file":"/nextcloud/apps2/onlyoffice/lib/AppInfo/Application.php","line":139,"function":"injectFn","class":"OC\\AppFramework\\Bootstrap\\BootContext","type":"->","args":[{"__class__":"Closure"}]},{"file":"/nextcloud/lib/private/AppFramework/Bootstrap/Coordinator.php","line":167,"function":"boot","class":"OCA\\Onlyoffice\\AppInfo\\Application","type":"->","args":[{"__class__":"OC\\AppFramework\\Bootstrap\\BootContext"}]},{"file":"/nextcloud/lib/private/App/AppManager.php","line":497,"function":"bootApp","class":"OC\\AppFramework\\Bootstrap\\Coordinator","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/nextcloud/lib/private/App/AppManager.php","line":290,"function":"loadApp","class":"OC\\App\\AppManager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/nextcloud/lib/base.php","line":1157,"function":"loadApps","class":"OC\\App\\AppManager","type":"->","args":[]},{"file":"/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/nextcloud/apps2/onlyoffice/lib/AppConfig.php","Line":1215,"message":"Could not boot onlyoffice: Call to undefined method OC\\Server::getUserSession()","exception":"{\"class\":\"Error\",\"message\":\"Call to undefined method OC\\Server::getUserSession()\",\"code\":0,\"file\":\"/nextcloud/apps2/onlyoffice/lib/AppConfig.php:1215\",\"trace\":\"#0 /nextcloud/apps2/onlyoffice/lib/AppInfo/Application.php(142): OCA\\Onlyoffice\\AppConfig->isUserAllowedToUse()\\n#1 /nextcloud/lib/private/AppFramework/Bootstrap/FunctionInjector.php(26): OCA\\Onlyoffice\\AppInfo\\Application->{closure:OCA\\Onlyoffice\\AppInfo\\Application::boot():139}(Object(OC\\Files\\Template\\TemplateManager), Object(OC\\L10N\\LazyL10N), 'onlyoffice')\\n#2 /nextcloud/lib/private/AppFramework/Bootstrap/BootContext.php(33): OC\\AppFramework\\Bootstrap\\FunctionInjector->injectFn(Object(Closure))\\n#3 /nextcloud/apps2/onlyoffice/lib/AppInfo/Application.php(139): OC\\AppFramework\\Bootstrap\\BootContext->injectFn(Object(Closure))\\n#4 /nextcloud/lib/private/AppFramework/Bootstrap/Coordinator.php(167): OCA\\Onlyoffice\\AppInfo\\Application->boot(Object(OC\\AppFramework\\Bootstrap\\BootContext))\\n#5 /nextcloud/lib/private/App/AppManager.php(497): OC\\AppFramework\\Bootstrap\\Coordinator->bootApp('onlyoffice')\\n#6 /nextcloud/lib/private/App/AppManager.php(290): OC\\App\\AppManager->loadApp('onlyoffice')\\n#7 /nextcloud/lib/base.php(1157): OC\\App\\AppManager->loadApps()\\n#8 /nextcloud/index.php(25): OC::handleRequest()\\n#9 {main}\"}","CustomMessage":"Could not boot onlyoffice: Call to undefined method OC\\Server::getUserSession()"}}
```