No longer accessible after Backup Cloud: writing to the "apps" directory is not possible

Nextcloud has been running reliably for a long time. After I apparently made my first backup with the backup app, the error message appears:

Screenshot 2022-04-24 133922

The directory I specified in the settings of the backup app was snap/backupapp. I have now also deleted it via ssh.

My assumption that because of a stupid setting of mine the hard disk space is full was correct. After I deleted the backup app via ssh and some backup files, instead of 100% of the hard disk space, 25% is now occupied again.
But the error message still appears. Restarting the computer and also Nextcloud did nothing.

About my system:
Linux 4.15.0-175-generic x86_64, Nextcloud Hub II (23.03.3), Snap-Installation mit Ubuntu-Server

Error-Logs:
Edit: sorry, how can I make it clearer or copy out the logs via Putty?

PHP-Fehlerlog:

[24-Apr-2022 03:56:01 UTC] richdocumentscode (proxy.php) error exit, PID: 32436, Message: no_fontconfig
[24-Apr-2022 03:56:13 UTC] richdocumentscode (proxy.php) error exit, PID: 32430, Message: no_fontconfig
[24-Apr-2022 03:56:15 UTC] richdocumentscode (proxy.php) error exit, PID: 32460, Message: no_fontconfig
[24-Apr-2022 03:56:18 UTC] richdocumentscode (proxy.php) error exit, PID: 32436, Message: no_fontconfig
[24-Apr-2022 04:00:58 UTC] richdocumentscode (proxy.php) error exit, PID: 722, Message: no_fontconfig
[24-Apr-2022 04:01:08 UTC] richdocumentscode (proxy.php) error exit, PID: 721, Message: no_fontconfig
[24-Apr-2022 04:01:13 UTC] richdocumentscode (proxy.php) error exit, PID: 1002, Message: no_fontconfig
[24-Apr-2022 04:01:21 UTC] richdocumentscode (proxy.php) error exit, PID: 722, Message: no_fontconfig
[24-Apr-2022 04:17:04 UTC] richdocumentscode (proxy.php) error exit, PID: 17378, Message: no_fontconfig
[24-Apr-2022 04:17:42 UTC] richdocumentscode (proxy.php) error exit, PID: 17392, Message: no_fontconfig
[24-Apr-2022 04:17:53 UTC] richdocumentscode (proxy.php) error exit, PID: 19727, Message: no_fontconfig
[24-Apr-2022 04:17:54 UTC] richdocumentscode (proxy.php) error exit, PID: 19727, Message: no_fontconfig
[24-Apr-2022 04:17:57 UTC] richdocumentscode (proxy.php) error exit, PID: 19813, Message: no_fontconfig
[24-Apr-2022 04:18:51 UTC] richdocumentscode (proxy.php) error exit, PID: 17378, Message: no_fontconfig
[24-Apr-2022 07:11:24 UTC] richdocumentscode (proxy.php) error exit, PID: 8588, Message: no_fontconfig
[24-Apr-2022 08:06:24 UTC] richdocumentscode (proxy.php) error exit, PID: 12978, Message: no_fontconfig
[24-Apr-2022 10:09:47 UTC] PHP Notice: fwrite(): Write of 2281 bytes failed with errno=28 No space left on device in /snap/nextcloud/30258/htdocs/lib/priva$
[24-Apr-2022 10:09:47 UTC] PHP Notice: fwrite(): Write of 3502 bytes failed with errno=28 No space left on device in /snap/nextcloud/30258/htdocs/lib/priva$
[24-Apr-2022 10:09:47 UTC] PHP Notice: fwrite(): Write of 3497 bytes failed with errno=28 No space left on device in /snap/nextcloud/30258/htdocs/lib/priva$
[24-Apr-2022 10:09:47 UTC] PHP Notice: fwrite(): Write of 3489 bytes failed with errno=28 No space left on device in /snap/nextcloud/30258/htdocs/lib/priva$


Mysql:

2022-04-24T10:42:44.861334Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this c$
2022-04-24T10:42:45.017426Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location ‘/tmp’ in the path is accessible to all OS user$
2022-04-24T10:42:46.144039Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: /tmp/mysqlx.sock
2022-04-24T10:42:46.144112Z 0 [System] [MY-010931] [Server] /snap/nextcloud/30258/bin/mysqld: ready for connections. Version: ‘8.0.28’ socket: '/tmp/socket$
2022-04-24T11:13:46.088953Z 0 [System] [MY-013172] [Server] Received SHUTDOWN from user . Shutting down mysqld (Version: 8.0.28).
2022-04-24T11:13:46.603640Z 0 [System] [MY-010910] [Server] /snap/nextcloud/30258/bin/mysqld: Shutdown complete (mysqld 8.0.28) Source distribution.
2022-04-24T11:14:38.720288Z 0 [Warning] [MY-010139] [Server] Changed limits: max_open_files: 1024 (requested 8161)
2022-04-24T11:14:38.720293Z 0 [Warning] [MY-010142] [Server] Changed limits: table_open_cache: 431 (requested 4000)
2022-04-24T11:14:38.845068Z 0 [System] [MY-010116] [Server] /snap/nextcloud/30258/bin/mysqld (mysqld 8.0.28) starting as process 2186
2022-04-24T11:14:39.322344Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2022-04-24T11:14:53.583755Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2022-04-24T11:14:54.701615Z 0 [Warning] [MY-013829] [Server] Missing data directory for ICU regular expressions: //lib/private/.
2022-04-24T11:14:54.886033Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2022-04-24T11:14:54.886087Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this c$
2022-04-24T11:14:54.996765Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location ‘/tmp’ in the path is accessible to all OS user$
2022-04-24T11:14:55.640607Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: /tmp/mysqlx.sock
2022-04-24T11:14:55.640669Z 0 [System] [MY-010931] [Server] /snap/nextcloud/30258/bin/mysqld: ready for connections. Version: ‘8.0.28’ socket: '/tmp/socket$
2022-04-24T11:32:23.101652Z 0 [System] [MY-013172] [Server] Received SHUTDOWN from user . Shutting down mysqld (Version: 8.0.28).
2022-04-24T11:32:23.363596Z 0 [System] [MY-010910] [Server] /snap/nextcloud/30258/bin/mysqld: Shutdown complete (mysqld 8.0.28) Source distribution.
2022-04-24T11:33:48.247922Z 0 [Warning] [MY-010139] [Server] Changed limits: max_open_files: 1024 (requested 8161)
2022-04-24T11:33:48.247927Z 0 [Warning] [MY-010142] [Server] Changed limits: table_open_cache: 431 (requested 4000)
2022-04-24T11:33:48.365123Z 0 [System] [MY-010116] [Server] /snap/nextcloud/30258/bin/mysqld (mysqld 8.0.28) starting as process 817
2022-04-24T11:33:48.370603Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2022-04-24T11:33:51.004534Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2022-04-24T11:33:51.571932Z 0 [Warning] [MY-013829] [Server] Missing data directory for ICU regular expressions: //lib/private/.
2022-04-24T11:33:51.573395Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2022-04-24T11:33:51.573446Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this c$
2022-04-24T11:33:51.623550Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location ‘/tmp’ in the path is accessible to all OS user$
2022-04-24T11:33:51.648371Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: /tmp/mysqlx.sock
2022-04-24T11:33:51.648415Z 0 [System] [MY-010931] [Server] /snap/nextcloud/30258/bin/mysqld: ready for connections. Version: ‘8.0.28’ socket: '/tmp/socket$

Apache:

[Sun Apr 24 10:42:51.377627 2022] [unixd:alert] [pid 2869:tid 140537964995776] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
[Sun Apr 24 10:42:51.377627 2022] [unixd:alert] [pid 2868:tid 140537964995776] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
[Sun Apr 24 10:43:34.416176 2022] [unixd:alert] [pid 5611:tid 140537964995776] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
[Sun Apr 24 11:13:46.154468 2022] [mpm_event:notice] [pid 2864:tid 140537964995776] AH00491: caught SIGTERM, shutting down
[Sun Apr 24 11:15:00.090362 2022] [ssl:warn] [pid 3323:tid 139834212517056] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches$
AH00558: httpd: Could not reliably determine the server’s fully qualified domain name, using 127.0.1.1. Set the ‘ServerName’ directive globally to suppress $
[Sun Apr 24 11:15:00.114539 2022] [ssl:warn] [pid 3323:tid 139834212517056] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches$
[Sun Apr 24 11:15:00.114828 2022] [lbmethod_heartbeat:notice] [pid 3323:tid 139834212517056] AH02282: No slotmem from mod_heartmonitor
[Sun Apr 24 11:15:00.115988 2022] [mpm_event:notice] [pid 3323:tid 139834212517056] AH00489: Apache/2.4.53 (Unix) OpenSSL/1.1.1 configured – resuming norma$
[Sun Apr 24 11:15:00.116031 2022] [core:notice] [pid 3323:tid 139834212517056] AH00094: Command line: 'httpd -d /snap/nextcloud/30258 -D EnableHTTPS -D Enab$
[Sun Apr 24 11:15:00.152084 2022] [unixd:alert] [pid 3344:tid 139834212517056] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
[Sun Apr 24 11:15:00.152084 2022] [unixd:alert] [pid 3345:tid 139834212517056] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
[Sun Apr 24 11:15:00.152084 2022] [unixd:alert] [pid 3346:tid 139834212517056] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
[Sun Apr 24 11:15:06.127675 2022] [unixd:alert] [pid 3963:tid 139834212517056] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
[Sun Apr 24 11:32:21.931205 2022] [mpm_event:notice] [pid 3323:tid 139834212517056] AH00491: caught SIGTERM, shutting down
[Sun Apr 24 11:33:55.390756 2022] [ssl:warn] [pid 1525:tid 140698038756544] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches$
AH00558: httpd: Could not reliably determine the server’s fully qualified domain name, using 127.0.1.1. Set the ‘ServerName’ directive globally to suppress $
[Sun Apr 24 11:33:55.393712 2022] [ssl:warn] [pid 1525:tid 140698038756544] AH01909: 127.0.1.1:443:0 server certificate does NOT include an ID which matches$
[Sun Apr 24 11:33:55.393877 2022] [lbmethod_heartbeat:notice] [pid 1525:tid 140698038756544] AH02282: No slotmem from mod_heartmonitor
[Sun Apr 24 11:33:55.394530 2022] [mpm_event:notice] [pid 1525:tid 140698038756544] AH00489: Apache/2.4.53 (Unix) OpenSSL/1.1.1 configured – resuming norma$
[Sun Apr 24 11:33:55.394563 2022] [core:notice] [pid 1525:tid 140698038756544] AH00094: Command line: 'httpd -d /snap/nextcloud/30258 -D EnableHTTPS -D Enab$
[Sun Apr 24 11:33:55.395268 2022] [unixd:alert] [pid 1528:tid 140698038756544] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
$u probably need to modify the User directive
[Sun Apr 24 11:33:55.395720 2022] [unixd:alert] [pid 1530:tid 140698038756544] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$
[Sun Apr 24 11:33:58.398717 2022] [unixd:alert] [pid 1900:tid 140698038756544] AH02155: getpwuid: couldn’t determine user name from uid 4294967295, you prob$

Your hard disk is out of space. The snap has no space left.

Yes, this was indeed a problem. But I deleted some files (the backup) and it still does not work. Now there should be plenty of free storage, about 119GB.

You are missing the required support template. Please fill this form out and edit into your post. It will help now that you’ve freed up disk space.

This will give us the technical info and logs needed to help you! Thanks.

Thank you @just , next time I know it.
The problem was a crashed config.php. I found an old one in an earlier snap-version. I used this hint: Cannot write into “apps” directory · Issue #1492 · nextcloud-snap/nextcloud-snap · GitHub