Sorry for the issues you're having with your Home app and accessing settings. I imagine it's frustrating to not be able to get to those settings for your network. Let's take a look at this and see if we can get your sorted out. One thing I would like to try first is to reset your connection to cloud services. The steps for that are below.
Open the Google Home app.
Once done, close the Home app and perform a full network restart to ensure that the new settings are in place. To do this, I would recommend doing a power cycle on your network.
If you run through those steps and things are still not working correctly, please let me know and we'll look at more options.