Thanks for getting back to us, now I can connect with your FTP server and manually updated latest version of Easyblog in your site, can you give it a try and see is it everything work fine now?
By the way, regarding this error `504 Gateway Timeout` error, the problem is actually because the "file copying" takes time and because your server is extremely slow in copying the files, it actually failed. The best way to fix this is to ask your hosting provider to look at the speed of file copying on the server. At the rate at the file is being copied, it's going to take a while.