Undefined array key "file_ext"

[cicide-dono]

Hello,
Since I upgrade piwigo and PHP, I cannot see my pictures.
I try with another theme and it works.
So, I deleted all my pictures.
But when I re upload one file, the issue still exists.
This is my new environment info :
Piwigo 12.3.0
Système d'exploitation: Linux
PHP: 8.0.21
MySQL: 10.3.35-MariaDB
Bibliothèque graphique: ImageMagick 7.1.0-20

Could you have any idea for fix it ?
I am sad because I like your theme.

Thanks you.
Best regards,
Cedric

[cicide-dono]

Hello,
I find a way to fix my issues.
I downgraded my PHP version to 7.4 and it works fine.
Sorry to bother you with this.
I will close the issues.