[solved] Receiving a 500 on nextcloud instance visit

[NudelSose]

When opening Nextcloud in the browser, i receive a 500 response code.

Curl output:

$ curl -i https://my-domain.tld

HTTP/2 500
server: nginx/1.18.0 (Ubuntu)
date: Tue, 08 Apr 2025 18:52:08 GMT
content-type: text/html; charset=UTF-8
content-length: 0
[...]

Today I switched the docker container hosting nextcloud-aio (I created a new one and deleted the old one, to switch to docker-compose and change some exposed ports).
To my surprise, the new Nextcloud picked of the old data (same backups, passphrase etc).
So I updated all containers. The dashboard gives me “healthy” status for all of them, however when I open nextcloud in my browser I get a 500 error.

I think it has something to do with this error log from the nextcloud container:

NOTICE: PHP message: PHP Fatal error:  Declaration of OCA\WebAppPassword\Controller\ShareAPIController::createShare(?string $path = null, ?int $permissions = null, int $shareType = -1, ?string $shareWith = null, string $publicUpload = 'false', string $password = '', ?string $sendPasswordByTalk = null, ?string $expireDate = null, string $note = '', string $label = '', ?string $attributes = null, ?string $sendMail = null): OCP\AppFramework\Http\DataResponse must be compatible with OCA\Files_Sharing\Controller\ShareAPIController::createShare(?string $path = null, ?int $permissions = null, int $shareType = -1, ?string $shareWith = null, ?string $publicUpload = null, string $password = '', ?string $sendPasswordByTalk = null, ?string $expireDate = null, string $note = '', string $label = '', ?string $attributes = null, ?string $sendMail = null): OCP\AppFramework\Http\DataResponse in /var/www/html/custom_apps/webapppassword/lib/Controller/ShareAPIController.php on line 109

However I could not find any mention of this error elsewhere online.

Versions

I could not find any information on how to determin the nextcloud version & apache version running, if these versions are needed, i’ appreciate a link on how to determine them

• Nextcloud AIO version
  • v10.11.0
• Operating system and version (e.g., Ubuntu 24.04):
  • Ubuntu 22.04.5
• Reverse proxy and version
  • nginx 1.18.0
• PHP version (e.g, 8.3):
  • replace me
• Is this the first time you’ve seen this error? (Yes / No):
  • Yes
• When did this problem seem to first start?
  • After successfully updating the containers & changing docker-aio container
• Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
  • AIO
• Are you using CloudfIare, mod_security, or similar? (Yes / No)
  • No

[NudelSose]

Okay, I solved this Issue:

The problem was I accidentally changed the NEXTCLOUD_DATA_DIR between the two installations. Therefore Nextcloud could not find the files it needed (I guess).

The solutions was to change back to the old data dir. In my case I had already deleted it, so the fix was to delete all container volumes and install nextcloud from scratch.

(In case someone has the same Issue in the future)