I had this problem with the peephole camera. First time set up, wouldn't ever get prompted for wifi. I connected to the ap and no luck. At first I couldn't connect to the ap, but was able to using a static ip in the 192.168.240.x subnet. But I kept getting a loop saying it couldn't connect. Here's what fixed it for me on my lg g7....
Did the 15 second orange button reset Restarted my phone Disabled static ip settings on ring ap Disabled Bluetooth Disabled mobile data Connected to my 2.4g wifi network Disabled avoid bad wifi network settings Started connecting the ring to my account from scratch
This time around all worked as expected!
Tldr Try disabling mobile data and Bluetooth on your phone