How can I attach my Old Nexus to new WiFI router?

[AC Question]

ttach Old Nexus to new WiFI router

How do I attach a several years old Nexus to a new WiFi. All forum methods fail and my network icon sits there, 100% reception power but with a little padlock on it which I cannot remove no matter how many times I 'connect', 'enter password' etc. and worse, I get no 'error' or 'success messages when I try these things. It just sits there.

 

[anon(632115)]

Re: ttach Old Nexus to new WiFI router

Are using mac filtering on your router? You may need to grant it permission