I do not know php or mysql, but through trial and error and a little help from the guys in the help forum I resolved the same problem you had.
I am not sure how it works buy it did for me, I commented-out the line 245 by putting // at the beginning and end of the line. My line looks like this:
//$ret = file_get_contents( "{$site['groups']}orca/?action=group_last_topics&forum=$groupID&virtID=$memberID&virtPass={$_COOKIE['memberPassword']}&trans=1" );//

It also resolved see more the problem with the last line of code on line 667. Try it and see. Good luck.