Have you reach out to customer support yet? Try that first.
Other questions:
Did you migrate the site from classic to EditorX or was it built from scratch in EditorX?
Do you remember what you were doing when the site failed?
Do you have a URL of the last published site, please?
I would be happy to go in an see what it going on, if you’d like. Share Website Manager access to your working site and we can work through the comments section together.
OR make a copy of the site and make me a co-owner, allowing me so that I can share it with other partners and customer support at Wix.
Teejay (teejay@iamteejay.com)