I got the following issue when I open nrf connect:
Unable to download latest app info: Unable to download apps list: Unable to download https://raw.githubusercontent.com/NordicSemiconductor/pc-nrfconnect-launcher/master/apps.json: net::ERR_NAME_NOT_RESOLVED. If you are using a proxy server, you may need to configure it as described on https://github.com/NordicSemiconductor/pc-nrfconnect-launcher
I strongly suggest Nordic consider to provide a mirror server to fetch the files. I guess lots of China developers can not access it due to this issue.