I did a clean install of Joomla 4.2.2 and the latest and greatest T4 Page Builder and T4 Framework on a subdomain (running PHP 8.0.20).
On a new page, I created a section with a slideshow.
When attempting to change the active image of the example slideshow, after hitting the Media button, I got the following error:
It seems none of the subfolders of folder images are accessible.
If I upload an image to folders images, it is not shown either.
Maybe the issue is already known.
Meanwhile, I will revert back to Joomla 4.1.5 which worked fine in a NAS environment.