Same issue, but I am using the Windows App Store version of TeamViewer, version 14.100 I am able to connect to other PCs/Servers with far different versions than the app, a couple as low as version 7. I have installed the latest version of TV on a PC in unattended access mode and can't see the screen. It has the same settings as all the other machines we've set up the UA modes and it is the ONLY machine that shows a black screen upon connecting. There is one saving grace, though - a user has to login through RDP to the server and THEN my TV screen shows the PC's desktop. Once the user logs out, then my screen goes black again. Again, this is the only PC doing this with unattended access in which I get a black screen upon connecting.
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