Cospaces has suddenly stopped running in Ubuntu

Hi there

As of a couple of weeks ago cospaces no longer runs in Ubuntu. Using Chrome Version 76.0.3809.132 (Official Build) (64-bit)

Interestingly it seems to be running fine on Raspbian Buster…

I get an error message saying that WebGL is not running in my browser. I have it activated and get a spinning cube in the test ( When I attempt to open a Space I get a little sad face displaying in the top left hand window :-\

Can someone help please?

With thanks