I had this on my machine the other day (while developing with Plotly in webGL mode). A proper restart fixed it. Happened after installing some system updates,

I had this on my machine the other day (while developing with Plotly in webGL mode). A proper restart fixed it. Happened after installing some system updates, so if you’re on a Ubuntu (or downstream) distro maybe give that a shot. I think something just got left in a bad state post-update.