Xi6-A Box Not Finding Network

We recently got an Xi6-A TV box for our bedroom TV. Initially, the setup was simple and finished without any problems. However, the WiFi strength in our bedroom is low because the bedroom is on the second floor and the router is in the basement at the opposite end of the house. So, I tried connecting the box to my mesh network which has excellent signal strength throughout the house. I was able to get the Xi6-A box to connect to the network using WPS. However, the box only showed a frozen image from the channel I was watching. The image didn't move or change and there was no sound.

So, I decided to try putting the box back on the Xfinity network. I unplugged the box and plugged it back in and then hit the Info button on the remote to go to the screen to choose the network. However, the screen says that it can't find any networks. Other devices, like my phone can see the Xfinity network in the bedroom even though the signal strength is weak. I'm not sure why the Xi6-A box can't find the network. I tried choosing the option to scan again but it still doesn't find any networks. I even tried rebooting the cable modem/router and still was unsuccessful.

I'm wondering if there is some setting retained in the box from when I connected it to my mesh network that is causing problems.

Is there a way to reset the box to factory settings so that I can try the initial setup again? Or is there something else I can try to get it to find the network?

I appreciate any assistance in getting this resolved.

Thanks.