I see this problem intermittently but have no solution. I suspect it has something to do with Wyze’s intermittent AWS outages and/or Google’s ongoing changes on their end. I realize that Wyze takes a lot of flak in the Forum because of stuff they break from time to time (and sometimes eventually get around to fixing), but in this case I’m more inclined to 
at Google because of several other Google Home issues I’ve experienced recently:
- They temporarily (albeit for several weeks) broke things like “turn off [this device plugged into a smart plug] in five minutes”; I ended up doing my own testing to try to document the problem. I’m under no illusion that this actually helped anything, but I think it helped to demonstrate that they had caused a weirdly inconsistent behavior with something they did on their servers.
- They made some changes to routines so that when my Bedtime routine runs and gets to the part where it used to ask what time it wanted me to set for the alarm in the morning, it now just says something like “All right. At what time?” It’s completely out of context, and if I didn’t know what already belonged there in the routine I would be puzzled about what Assistant was asking me at that point.
- They now ask me what home I want a voice command to control in certain situations when that never happened before. I’m a member of two different “households”, and both Google Homes have rooms with common names like Kitchen and Living Room. If I tell a smart speaker in my home to turn off the Kitchen lights, Assistant now says, “Sorry. I’m not sure which Kitchen you’d like to turn off.” Even if I specify my home’s name in the command, it still doesn’t work. I haven’t yet found a way around this short of possibly making sure the two homes don’t share any room names. It’s dumb.
I stand by a statement I made in another topic:
Yeah, that’s even more maddening when you have a routine that controls a number of different Wyze bulbs with multiple commands (turn on a bulb, set the color, set the brightness), and it fails with that message about being unable to reach Wyze home over and over and over until the routine is done, even if the bulbs are actually responding to the commands. What the what‽
It’s definitely maddening. I wish I could help you with advice or a fix. The best I can do at this point is commiserate with your frustration. 