How to remove the network error?

Question

Computer networks

Network error while downloading
Hello.

I tried several browsers, reinstalled the system from scratch, but this error does not disappear. It shakes for a couple of seconds, and then a "network error" occurs. Moreover, small files like music can be downloaded, but problems appear with large ones. I tried to use the modem in the phone by wire (the bodies are connected to Wi-Fi) - there are no problems. Youtube and games run without problems.