wp-admin shows blank page, how to fix it?

Question

I am working with WordPress 3.5.8. Yesterday I made some changes into it to a friend. I don\'t know what happened, but after some time when I try to log in at wp-admin side and

Answer 1

I just had this and it was a file / directory ownership issue. Fixed via SSH and changing the ownership recursively (-R):

chown -R ownerID:groupID /home/mydirectory/website

Change ownerID, groupID and filepath to be relevant to your own situation.