Description:
An error occurred when trying to open the integrated online help.

It seems that it is invoked a help system different (the old one) than the new browser-based one.

Steps to Reproduce:
1. Start LibreOffice, choose one component
2. Try to open the help through the menu Help > LibreOffice Guide or press F1
3. 

Actual Results:
The Help interface opens and give the following error:

"Object not accessible.
The object cannot be accessed
due to insufficient user rights."


Expected Results:
The Help should be displayed correctly. The Help should be open inside the predefined browser of the system (Firefox in my specific case) and not the "object".


Reproducible: Always


User Profile Reset: No



Additional Info:
Versione: 6.4.2.2
Build ID: 1:6.4.2-0ubuntu0.18.04.3
Thread CPU: 8; SO: Linux 5.3; Resa interfaccia: predefinito; VCL: kf5; 
Versione locale: it-IT (it_IT.UTF-8); Lingua interfaccia: it-IT
Calc: threaded

My system:
Operating System: KDE neon Testing Edition
KDE Plasma Version: 5.18.4
KDE Frameworks Version: 5.69.0
Qt Version: 5.14.1
Kernel Version: 5.3.0-46-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-3770 CPU @ 3.40GHz
Memory: 31,3 GiB