one typical reason is internet connection limitations. consider using `--proxy=proxy_type --proxy_host=host --proxy_port=port` alongside sdkmanager command where proxy_type is the type of proxy (http, https, etc), host is the host, and port is the port of the proxy you want to use for this reason. if you are unsure what are they and you are already using a windows proxy, it may already be written in windows \> settings \> Network & internet \> proxy \> manual proxy setup \> edit. another solution is using a VPN which tunnels all apps, or any other internet connection manipulations.

another typical reason is internet connect limitations. consider using `--proxy=proxy_type --proxy_host=host --proxy_port=port` alongside sdkmanager where proxy_type is the type of proxy (http, https, etc), host is the host, and port is the port of the proxy you want to use for this reason. if you are unsure what are they and you are using a windows proxy, it may already be written in windows \> settings \> Network & internet \> proxy \> manual proxy setup \> edit. another solution is using a VPN which tunnels all apps, etc.