We have just activated licenses for the Online Editor and are testing it to get used to it. The process of preparing the project/files within Studio and assigning the tasks to resources are standard.
However, when opening the file in the Online Editor we see only the GroupShare title bar with the option to "Check-in file", "Download" plus the "Documentation" and "Account" symbols.
The sample file is marked as checked-out in GS and can be checked-in through the interface.
The problem is that we do not see anything except the title bar which makes working in the Editor difficult ;-).
We are using GS 2017, SR1, Edge as browser.
Are there any Browser-related settings that need to be modified?

Thanks for any help.