Select virtual background

Debian 4.19.181-1
jitsi–meet 2.0.5870-1

By trying to select an virtual background as a user, a choice of pictures is shown. A picture can be selected and is marked.

But there is no preview shown and applying the picture has no effect. By adding an individual picture, it can be choosen, but will not be added to the collection.

Where in the configuration files can that behavior be adjusted? Or where can relevant Log-Files be found? Thanks for your support.

Check if that is helpful…

Thank you, that was the problem:

Removed <default-src ‘self’; img-src ‘self’; script-src ‘self’ ‘unsafe-inline’> out of my Content-Security-Policy

BEFORE:
add_header Content-Security-Policy “default-src ‘self’; img-src ‘self’; script-src ‘self’ ‘unsafe-inline’; style-src ‘self’ ‘unsafe-inline’; font-src ‘self’; object-src ‘none’; base-uri ‘none’; frame-ancestors ‘none’; form-action ‘none’; block-all-mixed-content”;

AFTER:
add_header Content-Security-Policy “style-src ‘self’ ‘unsafe-inline’; font-src ‘self’; object-src ‘none’; base-uri ‘none’; frame-ancestors ‘none’; form-action ‘none’; block-all-mixed-content”;

Thank you for your help!