The disk Macintosh HD can't be unlocked I am getting "the disk Macintosh HD can't be unlocked" popup error after reinstalling Catalina.

I checked Disk Utility, there are 3 partitions named, "Macintosh HD", "Macintosh HD - Data", "Macintosh HD - Data Data".

How can I fix this?
If you can still boot into the Recovery or Internet Recovery please open the Terminal app from the Utilities folder and copy the result of 


  du -f


and 


  diskutil apfs list


It is likely there was an issue with the install/migration and depending of free space you might have to erase and reinstall the OS (for that please follow the Apple guide at https://support.apple.com/guide/mac-help/reinstall-macos-mchlp1599/mac)

Editing the name of the drives so they are unique will help you know which is which.