Alright,
I read all 87 pages of this thread and am also getting the same error when trying to edit group permissions:
Database error in vBulletin 3.6.7:
Invalid SQL:
UPDATE vb_usergroup SET
MySQL Error : Unknown column 'mgccustomusergroupperms' in 'field list'
Error Number : 1054
Now I know the answer will be because both products are not installed. By this do you mean both product-mgc_bitfield_custom.xml and product-mgc_chatbox.xml are not uploaded to the server?
In my case both files are present on the server along with all the other files in their respective locations. So if that's what you mean by both products then I've got that covered. If that's not what you meant then what did you mean?
*Resolved*
Alright I'll jump on the grenade here......in the instructions:
# Import the product-mgc_bitfield_custom.xml product from the p folder.
# Import the produit product-mgc_chatbox.xml product from the p folder.
It says to import which does not mean copy. You have to go into Admin CP under Plugins and Products then select Add\Import Product and path to the xml files. Hehe I didn't get it the first time around. :P