I am using the Delegated Administration Extension.
Since I changed the runtime to Node 12, I looked at the “Migration Guide: Extensibility and Node 12” and changed the “Allowed Callback URLs” and “Allowed Logout URLs”.
However, when I open the Delegated Administration Dashboard, I get an error (Callback URL mismatch.).
Checking the log, it appears that the “redirect_uri” is specified differently than the “Callback URL” described in the Migration Guide.