WNDR4300 Connection is not private, certificate authority invalid

[psky]

When we try to connect to the internet with our cells, tablet, laptop, we get;

"Your connection is not private", NET::ERR_CERT_AUTHORITY_INVALID.

Called my internet provider who troubleshooted over the phone, then sent a tech out. After troubleshooting, tech says its strange that 2 MAC addresses come back whenever I try connecting just one device, when only one address should be coming back. Tech said the router is bad and needs replaced. The router is only 4 months old. Anyone heard of this issue?

[psky · Accepted solution]

Factory reset worked! You saved me from having to buy a new router, thanks.

[ElaineM]

Welcome to the community, @psky

Did you try using a different browser?

Which browser are you using?

Have you also tried doing a factory reset on the router? 

After resetting the router, reconfigure it as if it's brand new out of the box then check for your connection. 

[psky · Accepted solution]

Factory reset worked! You saved me from having to buy a new router, thanks.

[ElaineM]

You're welcome. Glad to hear that it's up and running!

Have a great day!