My WiFi says it doesn’t have a valid IP

Yes only apple devices have full internet access all other devices see network but as unidentifiable I’ve cleared cache, flushed dns and it still cannot connect or see IP configuration. I’ve cleared and renewed IP. What’s strange is that all this happened overnight???

The gist from the Comcast tech was that I may need a new router I was on phone with them for almost 3.5 hours troubleshooting it

I also changed WiFi name and password last night too and tested this morning after rebooting modem and still same issue