Tool Authentication not working with Moodle

[sirchnik]

Unfortunately the authentication for making request from our tool to Moodle is not working.
I do not know if this is my fault or the a library/LMS issue.
To reproduce just use the ags = launch.get_ags() aborts because it get the following Moodle error.
Moodle 4.2:
Exception - Argument 1 passed to mod_lti\local\ltiopenid\jwks_helper::fix_jwks_alg() must be of the type array, null given, called in [dirroot]/mod/lti/locallib.php on line 1335.
The error points to the jwks serving. Either the we do not set the jwks url correctly or the PyLTI1p3 library messed something up (or Moodle). (Perhaps this URL has to be allow or something)
It would be nice for grading and statistics to make the services work which was not part of our project.