Today I wasted time on automatic me_to_groups Groups adding. I used urls download from GroupsList, url have ?ref=bookmarks ending. If I copy from To List module to Me To Groups, automatic adding does not work since Bot does not find Gruop add link. If I delete in notepad ?ref=bookmarks ending, Me to Groups Bot works again finding Join button and clicking it. Please fix the error, since it is misleading and time wasteful to find debug solution.