Does anyone know why these fatal errors in symfony pop up?

Nextcloud version 21
Operating system and version Debian 10
Apache or nginx version NGiNX 1.19
PHP version (eg, 7.4): 7.4

The issue you are facing: Fatal errors in Symfony
Is this the first time you’ve seen this error? (Y/N): yes, since a a few days

Everything else seems to work correctly, but my client is a bit worried about these errors