I am getting the same error as many for Service Unavailable as many of the rest. My site also started having issues with Virtual memory starting around Thursday July 25, 2019. There were no changes to my site before the problems began.
While you are working on this problem perhaps you can also find out what's up with the ongoing problem with the images in cPanel not being displayed. It makes it hard to use. https://x10hosting.com/community/threads/cpanel-has-no-images.205665/
While you are working on this problem perhaps you can also find out what's up with the ongoing problem with the images in cPanel not being displayed. It makes it hard to use. https://x10hosting.com/community/threads/cpanel-has-no-images.205665/