这似乎不是Ruby On Rails/Rubymine问题，而是MacOS.

It doesn't seem to be a Ruby On Rails/Rubymine issue but a MacOS one.

来自 https://github.com/kelaberetiv/TagUI/issues/86:

在更高版本的macOS中存在新的依赖项.要纠正该错误，请执行以下操作.它会安装Homebrew(适用于macOS的软件包管理器)，并安装用于https连接的OpenSSL.

There is a new dependency in newer versions of macOS. To fix the error do the following. It installs Homebrew (a package manager for macOS) and installs OpenSSL for https connections.

如果您没有自制软件或不知道什么是自制软件

If you do not have Homebrew or don't know what is Homebrew

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew update && brew upgrade
brew uninstall openssl; brew uninstall openssl; brew install https://github.com/tebelorg/Tump/releases/download/v1.0.0/openssl.rb

或者如果您已经安装了Homebrew

Or if you already have Homebrew installed

brew update && brew upgrade
brew uninstall openssl; brew uninstall openssl; brew install https://github.com/tebelorg/Tump/releases/download/v1.0.0/openssl.rb