Hello. I set up the most recent versions of the driver and android app today (09/13/2020), and can connect my galaxy Tab A as a mirror, but cannot get the monitor wall to work. The Tab A shows up as "Invalid GUID" and continues to mirror. I followed the suggestions given in https://forum.spacedesk.ph/community/discussion-board/cannot-connect-multiple-android-viewers-shows-invalid-guid/#post-4671, but they did not help. Below are my specs. If anyone has a solution, I would love to try it.
PC: HP 14-dk1xxx, AMD Ryzen 3 3250U with integrated Radeon graphics. 4 gig ram (shared), Windows 10 64 bit, version 1909, build 18363.1082.
Tablet: Samsung Galaxy Tab A, model SM-T590, Android 10, kernel version 3.18.124-18974136.