Configure Edit in Excel in Business Central on prem

jorisve

Hi all
I've been struggling to configure the Edit in Excel functionality in Business Central on premise.
I'm trying to make it work in Business Central Spring Release (14.0.29530.0).
I was able to make the authentication against AAD and to replace the Open in Excel button by the Edit in Excel button.
When clicking the Edit in Excel button, Excel opens fine. But during the loading of the Excel addin, an error occurs:

I can't seem to find the issue or an actual error message.

Thanks in advance!