I'm making an authenticated call to /me:

https://api.stackexchange.com/2.0/me?access_token=[redacted]&site=stackoverflow&key=[redacted]

But it's returning:

{"error_id":500,"error_name":"internal_error","error_message":"this error has been logged"}

My token and key are valid so not sure what's happening.

Any info on this? Perhaps a bug?