There’s now a connection test that should tell you a little more about what is failing when you try to connect to WiFi as part of the install. If you go into the app, then go into Settings, then click Sense Monitor, you’ll see the Network Test about 1/2 way down the screen. Click on the right arrow and you’ll get the Connection Test screen.
Press that while you are near the Sense monitor and the app should go through a series of checks. If you push down into “View detailed test results” afterwards, you should see something like this, except with an issue raised.
What do your detailed test results show ?? You may end up needing to work with support, but this is a quick and easy self-test.