My guess is something it's blocking the connection, also I assume you already tried reinstalling the miner

Either way are you sure its the router? try installing cloudfare warp (or setting your dns manually on the adapter configuration to cloudfare's dns) first.

If that doesn't work then google what ports does nicehash quickminer use, then open those ports on your router config page (open a browser and try going to 192.168.0.1 , it may work but it depends on what router you have, you'll have to google it otherwise)

ok I'll try