Failed to get WebGL context; refreshing and restarting not working

[snailtime]

I don't really understand what's going on because it was just fine
Whenever I try to try to do anything, it keeps giving me the same message: "Failed to get WebGL context. You may need to refresh the web page, or restart your computer." Painting, Pencil, and all other shapes (except rectangles) do not work at all
I have done both refreshing and restarting, but nothing seems to work.
I am on a MacBook Pro and use Google Chrome: fully updated
it works fine on safari, but I regularly use Google Chrome and it's where all my artwork is stored
please help :(