It may be a caching problem with your browser or your internet connection may be having problems. You can try clearing your cache in the browser. If it happens again, try refreshing the page.
Because of the glitch, we had to go to a backup from this morning. Unfortunately, some PMs and notifications are now lost and will not be recovered. If you see posts that have missing elements, please flag them so we can see where the problems still exist.
You were wise to delete it and should report it as spam. Valid emails from TheCatSite.com are [email protected]. As always when dealing with email, also check that the email has not been spoofed.
Malwarebytes has a free version. Download that and do a scan.
Trying a different browser is a good step. Have you cleared the cache and cookies on Chrome? Also, disable any extensions you have in Chrome.