It seems I have run into similar problems, same 500 error after moving everything. But I am able to access the admin after the move but I am not able to see the website.
I followed the instructions from wordpress to move a multi site install from a folder to the root.
It seems that in some occasions it still refers to the /main directory which was the initial install location.
– could be permalink issue, for sure it is interfering but I dont think that is the main issue
– and in the network setting screen it still refers to /main for the ‘home’ – that seems the real issue but I dont know where to change this? browsing through files as we speak..
It looks like if I am able to change the home and than the permalinks it is solved…
any ideas/suggestions?
thanks.