7z encrypted file
Found an old 7z file that was password protected and the UI Extract Here option wouldn’t extract it for me. It said
There was an error while extracting “file.7z” The archive header is encrypted, but currently not supported
Found an SO question that a solution that worked for me.
Install tool sudo apt install p7zip-full then run 7z x file.7z.
It prompted for the password and all was well.