Help (F1) not working

Whenever I press F1, or select Help from the help Menu I get a:
“Object not acessible
The object cannot be accessed due to insufficient user rights.” message.
Any ideas on how to solve this?
Thank you

Seems to be LO 6.4.3.2? In some (not every) installations this occurs accidentially, I don’t know any reason (was on a machine with OS LinuxMint 19.3-64 Mate and PPA installation).

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Use search function in forum, possibly another question concerning this behaviour.

I’ve just solved the problem by making a new installation from Ubuntu site:

Thank you anyhow.