Support intro
Sorry to hear you’re facing problems. 
The community help forum (help.nextcloud.com) is for home and non-enterprise users. Support is provided by other community members on a best effort / “as available” basis. All of those responding are volunteering their time to help you.
If you’re using Nextcloud in a business/critical setting, paid and SLA-based support services can be accessed via portal.nextcloud.com where Nextcloud engineers can help ensure your business keeps running smoothly.
Getting help
In order to help you as efficiently (and quickly!) as possible, please fill in as much of the below requested information as you can.
Before clicking submit: Please check if your query is already addressed via the following resources:
- Official documentation (searchable and regularly updated)
- How to topics and FAQs
- Forum search
(Utilizing these existing resources is typically faster. It also helps reduce the load on our generous volunteers while elevating the signal to noise ratio of the forums otherwise arising from the same queries being posted repeatedly).
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
- 31.0.10
- Operating system and version (e.g., Ubuntu 24.04):
- omv 5.4.203-1-pve / Debian 10.13
- Web server and version (e.g, Apache 2.4.25):
AIO 11.11.0
- Reverse proxy and version _(e.g. nginx 1.27.2)
traefik 3.5.4
- PHP version (e.g, 8.3):
8.3.2.6
- Is this the first time you’ve seen this error? (Yes / No):
- yes
- When did this problem seem to first start?
after activation of the"Calendar and contacts backup”
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
AIO
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
no
Summary of the issue you are facing:
[After activation of “Calendar and contacts backup” community container I get “Error 500”]
Steps to replicate it (hint: details matter!):
-
Stop containers from AIO interface
-
Activate “Calendar and contacts backup”
-
Start containers from AIO interface –> all containers running
Log entries
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
2025-11-02T11:11:08.405517287Z Connection to nextcloud-aio-database (172.31.0.5) 5432 port [tcp/postgresql] succeeded!
2025-11-02T11:11:10.428956985Z now
2025-11-02T11:11:10.428982104Z -------------------------------
2025-11-02T11:11:10.428985044Z 2025-11-02 12:11:10.428407+01
2025-11-02T11:11:10.428987274Z (1 row)
2025-11-02T11:11:10.428989274Z
2025-11-02T11:11:10.440124036Z + '[' -f /dev-dri-group-was-added ']'
2025-11-02T11:11:10.440370203Z ++ find /dev -maxdepth 1 -mindepth 1 -name dri
2025-11-02T11:11:10.440761459Z + '[' -n '' ']'
2025-11-02T11:11:10.440768109Z + set +x
2025-11-02T11:11:10.490976661Z Enabling Imagick...
2025-11-02T11:11:11.498731096Z WARNING: opening from cache https://dl-cdn.alpinelinux.org/alpine/v3.22/main: No such file or directory
2025-11-02T11:11:11.498746606Z WARNING: opening from cache https://dl-cdn.alpinelinux.org/alpine/v3.22/community: No such file or directory
2025-11-02T11:11:11.530347370Z Connection to nextcloud-aio-redis (172.31.0.6) 6379 port [tcp/redis] succeeded!
2025-11-02T11:11:11.846950330Z PHP Fatal error: Cannot redeclare utf8_ord() (previously declared in /var/www/html/custom_apps/recognize/vendor/scoper-autoload.php:55) in /var/www/html/apps/suspicious_login/vendor/joomla/string/src/phputf8/ord.php on line 22
**** SNIP
2025-11-02T11:11:13.434905609Z Applying network settings...
2025-11-02T11:11:13.570180052Z PHP Fatal error: Cannot redeclare utf8_ord() (previously declared in /var/www/html/custom_apps/recognize/vendor/scoper-autoload.php:55) in /var/www/html/apps/suspicious_login/vendor/joomla/string/src/phputf8/ord.php on line 22
2025-11-02T11:11:17.644362066Z + '[' true = true ']'
2025-11-02T11:11:17.644378185Z + '[' 11000 = 443 ']'
2025-11-02T11:11:17.644380225Z + set +x
2025-11-02T11:11:17.767235392Z /usr/lib/python3.12/site-packages/supervisor/options.py:13: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
2025-11-02T11:11:17.767262422Z import pkg_resources
2025-11-02T11:11:18.807194606Z Waiting for nextcloud-aio-apache to become available...
2025-11-02T11:11:18.879497495Z [02-Nov-2025 12:11:18] NOTICE: fpm is running, pid 116
2025-11-02T11:11:18.879527094Z [02-Nov-2025 12:11:18] NOTICE: ready to handle connections
2025-11-02T11:11:18.941164005Z PHP Fatal error: Cannot redeclare utf8_ord() (previously declared in /var/www/html/custom_apps/recognize/vendor/scoper-autoload.php:55) in /var/www/html/apps/suspicious_login/vendor/joomla/string/src/phputf8/ord.php on line 22
**** SNIP
2025-11-02T11:11:24.693921863Z NOTICE: PHP message: PHP Fatal error: Cannot redeclare utf8_ord() (previously declared in /var/www/html/custom_apps/recognize/vendor/scoper-autoload.php:55) in /var/www/html/apps/suspicious_login/vendor/joomla/string/src/phputf8/ord.php on line 22
2025-11-02T12:05:23.784592228Z NOTICE: PHP message: PHP Fatal error: Cannot redeclare utf8_ord() (previously declared in /var/www/html/custom_apps/recognize/vendor/scoper-autoload.php:55) in /var/www/html/apps/suspicious_login/vendor/joomla/string/src/phputf8/ord.php on line 22
Web Browser
If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.
PASTE
Web server / Reverse Proxy
The output of your Apache/nginx/system log in /var/log/____:
Waiting for Nextcloud to start...
Waiting for Nextcloud to start...
Connection to nextcloud-aio-nextcloud (172.31.0.6) 9000 port [tcp/*] succeeded!
/usr/lib/python3.12/site-packages/supervisor/options.py:13: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
import pkg_resources
[Sun Nov 02 13:06:57.355965 2025] [mpm_event:notice] [pid 40:tid 40] AH00489: Apache/2.4.65 (Unix) configured -- resuming normal operations
[Sun Nov 02 13:06:57.356009 2025] [core:notice] [pid 40:tid 40] AH00094: Command line: '/usr/local/apache2/bin/httpd -D FOREGROUND'
INF | ts=1762085217.3727055 msg=maxprocs: Leaving GOMAXPROCS=8: CPU quota undefined
INF | ts=1762085217.3728986 msg=GOMEMLIMIT is updated package=github.com/KimMachineGun/automemlimit/memlimit GOMEMLIMIT=30006429696 previous=9223372036854776000
INF | ts=1762085217.3729303 msg=using config from file file=/tmp/Caddyfile
INF | ts=1762085217.374649 msg=adapted config to JSON adapter=caddyfile
INF | ts=1762085217.377693 msg=serving initial configuration
Configuration
Nextcloud
The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):
php occ results in
PHP Fatal error: Cannot redeclare utf8_ord() (previously declared in /var/www/html/custom_apps/recognize/vendor/scoper-autoload.php:55) in /var/www/html/apps/suspicious_login/vendor/joomla/string/src/phputf8/ord.php on line 22
Apps
The output of occ app:list (if possible).
Tips for increasing the likelihood of a response
- Use the
preformatted textformatting option in the editor for all log entries and configuration output. - If screenshots are useful, feel free to include them.
- If possible, also include key error output in text form so it can be searched for.
- Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.