Are you receiving any error codes? I checked your account and you currently dont have any ip blocks. Are you able to access from any other browsers or devices?
It seems the your ip was blocked for failed direct admin roundcube login. I have removed the block, but you will need to make sure your login credentials are correct.
I believe your dns settings you provided is using x13 server, but the domain in that settings is pointed to x15. We also see you are using multi accounts that is not allowed please use one account going forward.