Hey stickpig71, I took a look at your account but everything seems to be working as expected and saving seems to be working - this might be a local cache desync on your side, so to check and resolve this:
Clear your browser cache and cookies
Logout
Login again
If this is still happening, try another browser or in incognito mode
Beside cache it can also be that some kind of Anit-Tracking / Anti-Virus / other security software is preventing some requests of World Anvil making the right checks. Test the following to see if that may be the case:
Try disabling all software like Norton etc. ,
Try using the same browser in Incognito mode (normally disabled any plugins and extensions) ,
Try using a different browser
If it continues , use a mobile phone on a 4G/5G network so see if you can access the website with al your features activated
So try these and let me know if this still persists after those steps!