Is Google Docs still a toy?

Despite the new version removing some limits, working with Google Docs is still somewhat a lottery.
Here's the error of the day, on a chart that always used to work:

I've reported the error, but I've never had a feedback on previous reports...

Set lockscreen wallpaper with Muzei

This was tricky as it seems not to be documented anywhere.

It's possible to set the wallpaper of the lockscreen using Muzei, but it's not really intuitive:

Go in the screen settings.

Set BOTH wallpapers (home and lockscreen)

Select Live Wallpaper

Select Muzei.

Now the lockscreen wallpaper will be set along the home screen one.