I recently upgraded the LibreOffice software and now I get a message that says I don’t have authority to change the Read-Only can’t be changed. I had no problem before yesterday when I upgraded. I have uninstalled LibreOffice and reinstalled it and have the same problem.
Please provide operating system, version which you removed and version which you installed. Similar questions have been answered on this site but not many are accepted so I can’t point to anything particular.