@Robert i think i found it. It is a small bug of wpForo ?

The error happens ONLY if you post the FIRST topic in an EMPTY forum.

If the forum/subforum has at least one topic, the error doesn;t happen.

Ok, thank you for this info. I'll check it and update soon.

@robert

New clean installation of WP and wpForo 1.52.

See for yourself.

https://drive.google.com/open?id=1OEsJJBtbL-Hvl2V2ce0KLjPalH6R0cMd

Thank you for the video Anonymous20, this helps us a lot. I'll update soon.

Hi @anonymous20,

We couldn't find such an issue on our test websites. Please send admin login details to info[at]gvectors.com email address to allow us to debug it.