Are you all aware that this forum is showing several JS errors? Apparently due to optimization or plugin conflict?

Yes @anonymous20 you are right, all problems were from conflicts with gvectors addons old versions. After updating the addons to the newest version everything works fine.

If you have paid addons and you dont want to update / pay again for them do not update wpforo to last version or update and find other way resolve the issues if you can.