Error initializing communications with LMS

Summary:

Content (required):

Hi there,

I get this error with two users. The rest of the people in the location are ok but these receive that error for both courses done with Articulate Storyline and Rise.

QUOTE

An error has occurred

Error initialising communication with LMS

Press 'OK' to view debug information to send to technical support.

UNQUOTE

Once they click on OK, the debug window starts.

Thanks in advance for any hints.

Boyan

Version (include the version you are using, if applicable):

21C

Code Snippet (add any code snippets that support your topic, if applicable):