This article answer how the DIVAR network or hybrid UHD monitor setting cause black screen when UHD not supported
After changing the resolution of monitor to UHD (3840*2160), the attached monitors results always black.
According to the BVMS 11. Release notes > 2.2. Removed functionality chapter > The digital monitor wall functionality has been removed.
This removal has impact on the BVMS Viewer → Decoders are not supported anymore in BVMS Viewer starting with version 11.0
Other devices and functions that have been removed to ensure software security:
Map migration (removed Autodesk design review installation)
Note: The Monitor Group functionality is still available in BVMS Professional/ Plus/ Lite.