I have a nextcloud service running on a raspberry pi 4 and all was working well for a while. Today the url to the link suddenly stopped working and I am not sure where to look to fix it. The local ip still works fine.
I used DuckDNS as a link and followed these instructions mostly:
The port forwarding worked fine before and haven’t changed them. It only has been running for a week or so and am only newby 
I have been trying to change the port forwarding, like resetting it, with no avail.
If any one can get me on the way on where to look that would be great. Also happy to share some more information or logs, but don’t really know where to look.
edit: reached it by going to nameofurl.duckdns.org/nextcloud
The output of your Nextcloud log in Admin > Logging:
Error federation OC\HintException: No server to federate with found
2020-06-15T18:58:58+0200
Error federation OC\HintException: No server to federate with found
2020-06-15T18:58:50+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/theming/d16b-05cb-theming.css): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-15T18:55:17+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/theming/d16b-05cb-settings-admin.css.deps): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-15T18:55:17+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/text/d233-05cb-icons.css): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-15T18:55:16+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/settings/47cd-05cb-settings.css.gzip): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-15T18:55:16+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/notifications/783c-05cb-styles.css): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-15T18:55:16+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/files_sharing/c5f2-05cb-icons.css.deps): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-15T18:55:15+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/federatedfilesharing/4fda-05cb-settings-personal.css.deps): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-15T18:55:15+0200
Error PHP Object of class Sabre\DAV\Xml\Property\ResourceType could not be converted to string at /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php#117
2020-06-14T23:38:38+0200
Error PHP Object of class Sabre\DAV\Xml\Property\ResourceType could not be converted to string at /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php#117
2020-06-14T23:38:31+0200
Error PHP Object of class Sabre\DAV\Xml\Property\ResourceType could not be converted to string at /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php#117
2020-06-14T23:38:20+0200
Error PHP Object of class Sabre\DAV\Xml\Property\ResourceType could not be converted to string at /var/www/nextcloud/3rdparty/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php#117
2020-06-14T23:38:01+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/theming/d16b-4b8b-theming.css.deps): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-14T23:24:39+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/icons/icons-vars.css): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-14T23:24:39+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/core/5b8d-4b8b-css-variables.css.deps): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-14T23:24:39+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/text/d233-4b8b-icons.css.deps): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-14T23:23:51+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/tasks/2684-4b8b-tasks.css.deps): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-14T23:23:51+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/settings/47cd-4b8b-settings.css.deps): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-14T23:23:50+0200
Error PHP unlink(/media/nc/data/appdata_oc4d7p71eoed/css/privacy/62ab-4b8b-privacy.css): No such file or directory at /var/www/nextcloud/lib/private/Files/Storage/Local.php#229
2020-06-14T23:23:50+0200
Warning no app in context Login failed: (Remote IP: 88.88.89.205)
2020-06-14T21:52:58+0200
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'xxxxxxx',
'passwordsalt' => 'xxxxxxxxxxx',
'secret' => 'xxxxxxxxxx',
'trusted_domains' =>
array (
0 => '10.0.0.110',
1 => 'xxxxxxx.duckdns.org',
),
'datadirectory' => '/media/nc/data',
'dbtype' => 'mysql',
'version' => '18.0.5.1',
'overwrite.cli.url' => 'https://xxxxxxxx.duckdns.org/nextcloud',
'dbname' => 'nextclouddb',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbpassword' => 'xxxxxxxxx',
'installed' => true,
'twofactor_enforced' => 'true',
'twofactor_enforced_groups' =>
array (
0 => 'admin',
),
'twofactor_enforced_excluded_groups' =>
array (
),
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
'updater.secret' => 'x'
);
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE