Unable to use LibreOffice programs due to being locked
Unable to print
The program surely isn’t locked. Your workfile may be.
Your file being (say) MyFile.odt:
Look for a file .~lock.MyFile.odt# in the same folder. If there exists the respective LockFile it is a relic of an editing session not closed in the appropriate way due to a system accident. Delete it before opening MyFile.odt again.