Setting up a home network. How to combine wired and wireless network?

Question

WiFi

Good afternoon!
There is a SNR-CPE-ME2-SFP router with the latest firmware from the official website.
I also have a laptop (connected to a WiFi network)
Desktop computer (connected via cable to a router)
Samsung TV (Connected via WiFi)

The problem is this: if I share a video folder from a laptop using standard windows tools, then on the TV I can watch it and play it video.
But I can't do the same from a desktop computer.
If I connect a laptop via cable (cables are different, if anything), then folders become invisible on the TV and in general that something is connected.
An important point: when you connect the cable, the TV pings (as well as on wifi naturally)! but the possibility of streaming is only if you connect via wifi.
I also noticed a problem when transferring files over the network to spotify (local files to the phone)
After a long googling, I realized that the problem could be in the UPnP settings of the router. BUT UPnP service is enabled in the settings
Please help me figure out how to overcome this barrier between cable and wireless network )

Answer 1

Resolved the issue. The problem was not on my side. The latest update of the router fixed the error. Also, for normal operation of UPnP, I had to change the firewood of the lan adapter motherboard to an older version (on win 7 instead of win10)

Answer 2

Buy wi-fi adapter for PC