Please check on your router if the OS is connected and which IP address it got. Also the OS may faulty indicate that it has a correct IP address.
I had my router configured to always give my OS a specific IP address. When I reinstalled OS from its winter sleep it didn’t work. I found out after 2h search that another device was sitting on its IP and it couldn’t get it.
There are many possibilities. Try to check your router and then reduce the switches and access points in between if OS is not connected directly to your router. Can you still connect to your TP-Link?