@satimis As long as you have an access to the router web management interface (via wired computer) you can check what's the wireless password, no matter if you changed it or not. If you don't...

@satimis " Can I perform this step on a wire-connected computer in this network? ". That's the whole idea - to login the router web management via a wired computer and check what the wireless...

@satimis I still didn't get which password you forgot - wireless password for your router or its web management (administrator) pasword. In either case if you follow the appropriate guide from my...

@satimis If you forgot your router wireless password, follow this guide to recover it. If you forgot your router web management password then follow this guide.

@Abhijit92 Double check your router bottom sticker to determine its FW region and HW version - details. What if you set your 5GHz band to channel 149 - does it stand after setting it ? Here's a...

@DmitriyF Here's how to configure a guest network on Omada controller. Most probably Method 2 and Method 3 are what you're looking for.