trouble when trying to map a class notebook to MS Teams course

[hredmond]

Dear All

When I open a Class Notebook whilst in Class Notebook and then try to map it to the corresponding MS Teams course I keep getting the following message...We ran into a problem. Please check if the notebook belongs to that class.

Although I am checking that the notebook is connected to MS Teams as my LMS/SIS via the connections 'dropdown'.

Any advice on what I'm neglecting to do please?  

Thanks, Hayley

[#2]

same problem here, sesrching since a few weeks to find a solution, I find many same issues but never a solution!
„We ran into a problem. Please check if the notebook belongs to that class„