Description: Very similar to bug 133511: langpack installer reports invalid installation of LO7.1.03, cannot install langpack Steps to Reproduce: 1. Install LO7.1.03. and open to check if it works (in my case it does) 2. Close app, download lang pack (in my case DE), open .dmg, click install, select app in /Applications => "This is an invalid installation of LibreOffice 7.1" Actual Results: LibreOffice works, but only english Expected Results: Show german localized interface Reproducible: Always User Profile Reset: Yes Additional Info: Same problem on varios machines
*** This bug has been marked as a duplicate of bug 134607 ***
For a workaround see answer to question https://ask.libreoffice.org/en/question/291725/cant-install-dutch-language-pack-on-macos/