When trying to access the Registrar on cloudflare receive API Request Fail (504)

When trying to access the Registrar on cloudflare front page I always receive this error message

API Request Failed: POST /api/v4/accounts/c9251d412f9ea7519420ca6bcc6cfaf5/registrar/domains (504)
Have cleared cache, restarted computer and logged out and back in again.

Therefore I am unable to transfer any domains.

Is there a known solution please?