Hi @nidcode,
I hope it's fine to answer in English, the solution should be easy enough to spot even without the translation 
The error is stated in the exception: [Unexpected JWT issuer: https://xxxxx.auth0.com/]
You have configured Elasticsearch to think that the Issuer is https://xxxxx.auth0.com but the issuer is actually https://xxxxx.auth0.com/ (mind the trailing /) . These might look like URLs but are treated and compared as strings so https://xxxxx.auth0.com is not the same as https://xxxxx.auth0.com/
In summary:
Change
op.issuer: https://xxxxx.auth0.com
to
op.issuer: https://xxxxx.auth0.com/
and it will work just fine.