Hi, I had the same problem.
Im not sure which steps will help but look what i did
1) Sign out from Microsoft accounts, windows, office, microsoft store
2) Deleted previous version with Revo Uninstaller Pro
3) Cleaned Registry with CCleaner
4) Restart
5) Installed Office 2019 ( Dont Open It )
6) Launch Activation .cmd
After this steps all fine and works well.
