Updated FW from 4.40 to 4.41 and getting 404 page trying to open web interface on the new subnet - 192.168.75.1 vice 192.168.50.1
Factory reset same issue after re-configuring.
Guessing you are on FW 8.4.1 rather than 4.41 but I am still not certain I understand the issue. Question: After you change the address of the router - have you renewed the IP address of the client computer you are using to communicate with it? If, for example, you change the computer’s address from 192.168.50.1 to 192.168.75.1, you must renew the address of the computer you are using to talk with it. If your computer has been assigned an address in the 192.168.50.0/24 subnet (e.g., before you made the change to the router) you will not normally be able to communicate with a host in 192.168.75.0/24.
Easy to fix by simply disabling and re-enabling the ethernet adapter (there are other ways to do this.) That should give you an address such as 192.168.75.x, according to the DHCP range you have set, and allow you to communicate with 192.168.75.1. Let us know if this solves the issue.
Solved it. Thank you though!