Hey there,
I am really sorry for the delay of this reply as it is a public holiday for us here.
It seems like I was unable to login from your backend and FTP server, this is what i hitting now :
FTP
--------
Status: Initializing TLS...
Error: Connection timed out after 20 seconds of inactivity
Error: Could not connect to server
Backend
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Protected area
By the way, can you temporary disable your JCH - Optimise plugin, cache system and clear all the cache from your site backend and see how it goes?
Keep us update if the issue still persists.