I am aware there's 3rd party companies that market Linksys devices (just put their own label on them.) And I suspect yours will be identical to the Linksys.

Make sure UPnP is turned on; see Linksys UPnP setting (click on link) as yours should be similar.

Then go to LW's menu bar, Tools>Options>Advanced>Firewalls & check to make sure UPnP is checked. And also make sure the port numbers all match. Don't forget to press Apply button for any changes.

After opening LW, give it plenty of time to load & connect. Give it 20-30+ mins.

I have a suspicion the issue is this Cisco device. Failing UPnP, you can manually port forward the Cisco device, but let's get to that as a last resort.

Dash Grandpa you beat me this time! lol Either I'm getting slower or you're getting faster!