Cloudflare access and Logout app bar

Recently I found out about Cloudflare access, such a great service!

I had it configured and running in a matter of hours. But now I’m facing one issue:

So I have a cname called graph.MyDomain.com and I point it to my server. I’ve enabled Cloudflare access on it clicking on the orange cloud icon in DNS settings and configuring the rules in the Access section.

After that I thought it would be nice to have a logout button, so I wen forward and installed the logout app bar.

But I can’t get it to work, when I click on the logout button I get:

Error 1014 Ray ID: 4as08fd5bca43b60 • 2019-06-18 22:04:56 UTC

CNAME Cross-User Banned

Can anybody help me with this ?