I recently upgraded to VCD 5.5.1.0 and AnyDVD 8.4.5.0 on my PC running Windows Server Essentials 2019
I noticed that when AnyDVD started, it said it could not find any DVD drives.
I uninstalled both, then reverted VCD back to 5.5.0.0 and AnyDVD ran just fine.
So, I think VCD 5.5.1.0 is not fully compatible with AnyDVD in this environment.
I have two Windows 10 1909 machines that did not have this issue at all.
I noticed that when AnyDVD started, it said it could not find any DVD drives.
I uninstalled both, then reverted VCD back to 5.5.0.0 and AnyDVD ran just fine.
So, I think VCD 5.5.1.0 is not fully compatible with AnyDVD in this environment.
I have two Windows 10 1909 machines that did not have this issue at all.