Login error, error 404

Since updating to Vodafone fibre, Orbi network doesn’t link to approximately 40% of webpages, links. This used to be overcome by inputting webpage directly but this no longer works. I have to return to the house, switch back to Vodafone to look at a website, then walk back to my studio. Not exactly productive. I have tried accessing the login to change to AP as I’ve read this should sort it but I can’t login to admin using the generic password. When I tried on the app, I got the usual login box as is in the photo.