I have try to use firefox to visit CoSpaces it works.But I am using the latest version of chrome browser and my WebGL is always on. Also I had to uninstall and install the chrome browser again. But the problem still cannot be solve. p.s. I’m used Chrome for CoSpaces over two years and without this problem.
OI. Eu estava com este problema também. Tente fazer o que ensinam nesse tutorial aqui. Funcionou pra mim 
https://www.youtube.com/watch?v=W6B1zDEr4A0&t=8s