I am experiencing and performed the same troubleshooting from this thread.
I previously emailed litter robot about the issue over a year ago but they did not provide any useful support nor offer a WiFi replacement despite still being within the extended warranty period.
The issue actually happened early in the litter robot’s life but between multiple personal issues involving myself and some some involving my cat I wasn’t able to even begin to troubleshoot.
I only got 18 cycles out of the unit until it quit working on wifi entirely.
We are sorry to hear that you are having trouble with your Litter-Robot.
Please provide us with your order number or a copy of the invoice.
Also, please make sure that you are using the latest version of the Whisker app and that your router is close enough to the robot and set to 2.4Ghz instead of 5Ghz.