Here's what I got from someone on a help chat for Google Home
support:1:10:53 PM Eduardo: It appears that Google Home is currently
restricting the ability to schedule routines that involve turning on or
off outlets or switches, even if they are defin...
Similar problem for me - I have a routine that had been working for a
long time and now I get the "safety" message. I just want the routine to
set lights to a certain brightness, turn them off and then turn them
back on at a specific time later. Now ...