After upgrading to WebWork 2.16, I seem no longer to be able to use WeBWorK via the Moodle Assignment module (wwlink/wwassignment, from the openwebwork github).
When I click on existing "WeBWorK Problem Set" activity in Moodle, a new page opens with the error message
Exception - Function ("get_user") is not a valid method for this service
I get the same error message when I try to add a new "WeBWorK Problem Set" activity.
When I try to configure an existing "WeBWorK Link" block inside a Moodle course, I get the error message
Exception - Function ("list_courses") is not a valid method for this service
Trying to add a "WeBWorK Link" block to a Moodle course, gives the same error message.
Any help or hints would be greatly appreciated.