Mendeley plugin not responding?

In ubuntu 18.04, I installed Mendeley desktop (1.19.5) and when I open Libereoffice wirter ( to add citation, bibliography, choose citation style, etc. nothing seems to work. Then when I checked at the extension manager of Libereoffice writer I found a problem Error: The status of this extension is unknown (attached the pic).
Can somebody help?

Thank you.

I think the problem was with the Libereoffice version.
I just downgraded Libereoffice writer from to Version:

Now Mendeley plugin is functioning smoothly.