ERR_BLOCKED_BY_CLIENT means your browser or an extension is stopping a web page...

https://charliekzxa221.huicopper.com/how-do-i-whitelist-a-domain-but-keep-blocking-ads-everywhere-else

ERR_BLOCKED_BY_CLIENT means your browser or an extension is stopping a web page from loading. To fix it, try opening the page in private (incognito) mode. If it works there, check your browser extensions and turn off any that might be blocking content