Your network adapter is the hardware component that allows your device to communicate with the Ethernet network. You should check if your network adapter is enabled updated and configured correctly. You can do this by going to the Device Manager on Windows or the Network Preferences on Mac and looking for your network adapter under the Network Adapters section. You should also check if there are any errors or warnings associated with your network adapter. If there are you can try uninstalling and reinstalling your network adapter driver which is the software that controls your network adapter.