Mod_security error when selecting, uploading images

Hello :slight_smile:

I am suddendly getting an error when attempting to select or upload images to a certain kirby installation.

This is 3.7.5 on php 8.0 on hostgator.

When uploading the image it simply says: ‘The file could not be uploaded’ in the usual dialog window.

If I attempt to select a previous image, I get a bigger red border window that says:

This is new, and I assume provoked by changes in the server by hostgator, as they updated the admin panel of their hosting.

Files and folders are 644 755.

How to troubleshoot?

Thank you