Undefined Error in display

[markmarucot]

I browsed my forum today and I saw the undefined error. Any idea on how to fix this?

https://vborg.vbsupport.ru/attachment.php?attachmentid=68703&stc=1&d=1187537697

[Marco van Herwaarden]

That page seems to be related to a modification and not standard vBulletin. Please post your problem in the thread about the modification that is causing this.