error with forum after upgrade 7.1.2

File inclusion failed.
Did you properly edit inc/header.inc.php file ?

i got this error message when i try to go into the forum module via the admin panel... so i cant do the last action to finish my upgrade...

Recompile Forum language file from Admin Panel -> Modules -> Forum -> Manage Forum

and yes i edit the inc/header.inc.php and i empty the cache... again and again...

so what is the problem.... AGAIN

It is fixed, I replaced your entire /modules/boonex/forum directory files...

check your forums now. 

 Anytime "we" get this error, it is usually caused because one or a couple files did not transfer or were corrupted when uploaded.

The normal fix is to replace the entire directory of the module in question.