I ran into this issue with my Mac running El Capitan 10.11.6 & Chrome 59.0.3071.109 (current at the time of this writing).

When I went to start a new GSHEET (google docs spreadsheet), I was met with this uneditable page:

…. because I wanted to keep track of parts and pricing while I’m researching styles of work benches to build on Pinterest, I get:

 

GAH.

So, I disabled all of my extensions & that didn’t work.

Incognito mode DID allow all pages to be rendered correctly, but I can’t work out of that mode, so I dug further & found this in Chrome Settings:

Click on Advanced:

Scroll down &fine “Use hardware acceleration…” option and slide it to “off” – which is a gray color.

Click: “RELAUNCH” to restart the browser.

 

And now it all works!

GSHEETS:

 

Pinterest: