Posted by: @robert

Have you excluded the new board URL from your cache plugin? Please find the instruction for your cache plugin and add "*" at the endo of the second forum URL if it's necessary: https://wpforo.com/community/faq/wpforo-and-cache-plugins/#post-37150

Please press F12, open the browser footer tool, switch to Console Tab and find red marked errors. If you see any, take a screenshot and paste it here.

Please answer to @robert questions. That will give us more information to be able to help you.

More info please... Has the button stopped working?

Have you excluded the new board URL from your cache plugin? Please find the instruction for your cache plugin and add "*" at the endo of the second forum URL if it's necessary: https://wpforo.com/community/faq/wpforo-and-cache-plugins/#post-37150

Please press F12, open the browser footer tool, switch to Console Tab and find red marked errors. If you see any, take a screenshot and paste it here.