I tested two images but when I attempt to post the topic in the gallery forum, it halts with a message
The host from which you are accessing the forum is not recognized as a valid host. This is more than likely related to a firewall issue that is blocking the referer variable. Check your firewall settings and try again.

Read this topic to correct it in the UBB cp.
https://www.ubbcentral.com/forums/ubbthreads.php/topics/218421/Not_recognized_as_a_valid_host.html

Also image size is limited to 500KB.

Last edited by Ruben; 07/04/2021 1:15 PM. Reason: corrected typo
Blue Man Group
There is no such thing as stupid questions. Just stupid answers