Stuck in "Verify you are human" loop

Since yesterday I have been unable to access a website I use every day (rootschat) due to an interminable “Verify you are human loop” courtesy of Cloudflare.
I have tried using two different computers, with Chrome and Edge. Normal and private/incognito modes.
Also two different smartphones using Chrome and Firefox.
All exhibit the same problem - I’m now totally locked out of the site.