I have the same error...
I don't know what it is...
It happens to me when CPU is almost 100% with several threads but no documentation available.
For example, here's a simple script that only works if you sleep (in this case, 5 seconds) and load the page again.
This is the only way to work out the wait page, otherwise it will crash with the error: Failed to wait of state complete
here is a non-working version of the script:
Changing the browser settings does not affect the performance of waiting for the page to load.
Perhaps something is not loading specifically on this site https://500px.com/ right away, or something with cookies, and therefore we have to resort to such crutch methods.
