RFC6749 states that error_description field MUST NOT include characters outside the set %09-0A (Tab and LF) / %x0D (CR) / %x20-21 / %x23-5B / %x5D-7E.

For example the Token endpoint response returns this error, which makes the open id connect certification fail :
https://github.com/lepture/authlib/blob/4eafdc21891e78361f478479efe109ff0fb2f661/authlib/jose/errors.py#L85

The quotes should be removed from error_descriptions