Pie 400 . Network wifi connection issue

Hi Folks

Running the raspberry pie 400 and enjoying it. Initially I started with Ubunto 20.10, but installed love Ubuntu Mate.

The main issue I'm having is connecting to my actual wifi with MATE. It works absolutely fine with Ubuntu 20.10 (Normal ubuntu), but when Install MATE, it just wont connect. Annoyingly, when I run a hotspot and ask MATE to connect to it, it all works fine.

Really would appreciate some advice !