LinkStack version

4.8.4

Description

After update to 4.8.4 (or could be earlier, as I did not edit links every time), adding and editing links broke. Interfaces work well, but clicking on "Save" and "Save and add more" result in Error 500.
Deleting links is permitted.
Trying to create a backup also results in 500.
File access permissions in "diagnosis" page are reported as ok. File permissions in system are linkstack:www-data. Tried to bulk-change to linkstack:linkstack without success.

Details about your system

Debian 12, YunoHost 12.0.9.1 (stable), bare metal home server.

How to reproduce

not sure what info to provide here.

Possible Solution

No response

Additional Context

No response