I had the same problem. Support pointed me to these instructions, which I followed to no avail: https://wiki.covecube.com/StableBit_DrivePool_Q3017479
I reverted from 20150.rs_prerelease.200612-1734 to 19645.mn_release.200605-1502 via Windows Update Settings -> Recovery -> Go back to the previous version of Windows 10 and the symptoms are gone, my old pool showed up immediately with no issues.
Super interested to hear of a real solution!