No wifi with Airport express

Try move the Ethernet cable to the other Ethernet port on the Express.

If still no luck, as a temporary test, connect the Express directly to an Ethernet port on your main router. Restart the router and Express.

If things work that way, then you know the Express is OK and the problem is elsewhere.

If still no luck, it looks like Ethernet on the Express has failed, so WiFi will not be able to connect to the Internet. The Express is at least 5+ years old and as much as 11+ depending on when it was placed into service. 5-6 years is about the average useful life of an Express.

Do one more setup on the Express.

Power up the Express and let it run for a minute

Hold in the reset button for 7-8 seconds and release

Allow a full minute for the Express to restart to a slow blinking amber light status

Run the setup again.

Unless something is very wrong, Airport Utility will set up the Express in Bridge Mode......Apple calls this "Off (Bridge Mode)". That is the correct setting.

Setup using a Mac is easier than an iPhone / iPad in my experience.

WAN port has likely failed, but the other port might work. Did you try the LAN <--> port?.

You would see the same message if the Ethernet port on the bridge was not working as well. Try to test by connecting another device to the Ethernet port on the bridge.

If the bridge checks out OK and still no connection, Ethernet has failed on the Express.

I assume that you have powered off the wireless bridge and the AirPort Express, waited a minute, then powered up the wireless bridge, let it run for a few minutes, then connected the AirPort Express and powered it up and let it run for a minute or two.......correct?

If not, please try that sequence.

If still no luck, please try the same sequence again with a different Ethernet cable.

If still no luck, not much else that you can do other than try another Hard Reset on the Express and set it up again. There is no need to power the AirPort Express off for an hour after the Hard Reset.

Ebay.com has them in refurbished and used if you still want an Apple device. Otherwise, any WiFi router that can be set up in Bridge Mode will work.

I had this issue and I chose the ignore option. my internet seems to be working fine. I had to restore the unit 2 times one for each error issue

The AirPort can create a network in Bridge Mode. That is the correct setting for your Express. The setup utility automatically sets up the Express in Bridge Mode.

I've yet to ever find that ignoring an error makes it go away, but others may have better luck.