Hello,
I tried to open the forum using safe mode and it works
but this is not solution!
after recent updated it was critical updates
the user card gone to right up and down with main container like I mentioned here
and now ?
the reply button broken 
This probably means one of your theme components or plugin is interfering with the button. Try disabling the theme components to identify the culprit.
Did you manage to track down which customisation was causing the trouble?
Hello jammy,
they edit the source code in RTL and no one solve it so i just moved to xenforo
at least there is no errors in RTL.