[HELP] security token was missing or mismatched.

Hello,

Iam using VBCMS i have changed the forum to forum.php and cms to index.php i read something about read instructions from the cms i checked the vbcms but unsuccessfully i have still no idea plz give me some advise how i can fix this problem i would rly like to use the score stuff too

I am using

vB v3.7.1
ibProArcade v2.6.7a+

Your submission could not be processed because a security token was missing or mismatched.

If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error.

Thanks
Regards,
Koidl