Exception unwrapping data: Tag mismatch! in "Profile Action ValidateGrant"

[Cantor, Scott]

>    I unfortunately only sometimes get an “Exception unwrapping data: Tag mismatch!” when an oidc-rp tries to
> get the access token in the Authorization Code Flow. 

That client is mishandling the code then, it's changing something in the data.

>    I traced the problem down to [1] but could not find out where to increase debugging to show me what
>  exactly is wrong with the data that should be unwrapped.

Wouldn't tell you anything more, it's a decryption failure because the data has been modified.

-- Scott