Could not run source riddler: unexpected status code 500

[kschluns]

I'm noticing that Subfinder is often failing to run the Riddler source with status code 500 in the error message. Has anyone else had issues with Riddler in the past and is there anything one can do to reduce the likelihood of 500 error?

EDIT: It's a status 403 error not a 500 error.

[olearycrew]

I can't even get Riddler's website to load - I wonder if they are having some sort of server issues?