Strange Godaddy issue - Unable to reply to posts

[RichieBoy67]

I hope you are all doing good!

A client has multiple Vbulletin sites on both shared and dedicated servers through godaddy. Yesterday on all these sites his members started being unable to reply to posts. They are getting the following - Are they working on something or have they changed something and are others here having this issue?

The connection to the server was reset while the page was loading.

The site could be temporarily unavailable or too busy. Try again in a few moments.
If you are unable to load any pages, check your computer's network connection.
If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.

Thanks,
Rich