Hello everyone! After the incorporation of the new classes patch on 6/1/2018, players have been having trouble downloading the patch and have been prompted with installation errors.. To fix these, I have found a solution to manually patch your client. You will find a link attacthed to this post, download the zip file from there and follow the directions below.
Download the file I linked, then open the GFO launcher, click 'Option' then 'Manual Patch' and select the folder. Don't extract it or anything. Use the folder you downloaded.
Download File/Folder -> Open Launcher -> Options -> Manual Patch -> Select the folder.
Should download 7000 files, manually patching the game.