Only 2 things I can come up with now is dns not updating on the router, or check and see if something added or edited the host files and that’s referencing the old network.

it’s always dns

You shared them from a 192.168 then changed it to a 10. Make sure the new network is in trusted not public.

She’s from group B. Group A loads correctly. Group B does this stuff on purpose so we in group A will just stop letting them screw this up and they no longer have to load it.