i am having a similar problem on my Core Machine:
Core Machine: Windows 10.0.186363, Lenovo Yoga 920 i7 8550 CPU, 16GB RAM, 1TB SSD, Roon 1.7, Build 528
**Network: USB C thunderbolt port connected to Gig Ethernet via Lenovo Thunderbolt 3 Dock Gen 2 docking station
**Audio Devices:Ethernet connection to Linn Akurate DSM
My PC (details above) has a recommended display resolution of 3840x2160 with 300% scaling. I do not have this problem with other applications. Putting the scaling at 100% renders the text on all applications, including Roon, un-readably small (although i do not receive the error). At the recommended scaling i get the error noted in the title, and am forced to run full screen, unable to see my task bar.