我爱模板网在使用gem安装依赖时：
sudo gem install -n /usr/local/bin activesupport -v 6.1.7.3
提示下面的错误：
ERROR: Could not find a valid gem 'activesupport' (= 6.1.7.3), here is why:
Unable to download data from https://rubygems.org/ - too many connection resets (https://rubygems.org/specs.4.8.gz)
^CERROR: Interrupted
解决办法就是当前镜像没了，换个镜像试下，如：用下面的命令
gem sources --add https://gems.ruby-china.com/ --remove https://rubygems.org/ gem sources -l