Only one device won't connect to network
We have several Apple devices but I have a recurring issue connecting to my Macbook Air to mypreferred wifi network. When I attempt to switch to that network it won't accept the password when I type it in, or when I have the password provided by another device (connected to that network).
If it matters: Recently I "upgraded" my Verizon service and that process involved moving the main router (that I now have trouble with) to the basement and an extension was placed in the spot the main one previously occupied. I also have a second extension on the top floor of my house to which my laptop will still connect. That second extension has been functioning properly for years.
The problematic network does appear as available in my Macbook's list of networks, but as I mentioned above, the password entry dialog box keeps reappearing after I enter the (correct) password.
MacBook Air (M1, 2020)