Containers/com.apple.mail/Data/DataVaults file can’t be removed from Trash

Containers/com.apple.mail/Data/DataVaults file can’t be removed from Trash after Delete User routine hung-up while running Users&Groups.

When logged in as root this also didn’t work: rm -f   

The file is unlocked. It has “unknown” permission!

If I run "strings" in the terminal window I see this:

% strings DataVaults

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

The following is the Console system.log report after I tried to empty trash from the finder:

Mar 17 12:17:42 GS2020 xpcproxy[1913]: libcoreservices: _dirhelper_userdir: 557: bootstrap_look_up returned (ipc/send) invalid destination port

Mar 17 12:17:42 GS2020 MusicCacheExtension[1914]: objc[1914]: Class PDFToRasterImageRef is implemented in both /System/Library/PrivateFrameworks/AMPLibrary.framework/Versions/A/AMPLibrary and /System/Applications/Music.app/Contents/PlugIns/MusicCacheExtension.appex/Contents/MacOS/MusicCacheExtension. One of the two will be used. Which one is undefined.

Mar 17 12:17:42 GS2020 TVCacheExtension[1915]: objc[1915]: Class PDFToRasterImageRef is implemented in both /System/Library/PrivateFrameworks/AMPLibrary.framework/Versions/A/AMPLibrary and /System/Applications/TV.app/Contents/PlugIns/TVCacheExtension.appex/Contents/MacOS/TVCacheExtension. One of the two will be used. Which one is undefined.