Hi, According to ReleaseNotesforZerto8.0U2-Rev07 http://s3.amazonaws.com/zertodownload_docs/Latest/Zerto%20Virtual%20Replication%20Release%20Notes.pdf?cb=1584625030 on page 17 SCVMM 2019 and Hyper-V 2019 are now supported Cheers
I had the same issue after upgrading Zerto in 1 site (other was fine after upgrade). In my case the solution was to run Zerto Diagnostics -> Reconfigure Zerto Virtual Manager which basically was next,next,next. After installer has finished, my service was up and running and I could finally log in. Hope this helps. Regards