I installed middleman but got the following error, pls support:

/u01/vt_media/FrontEndSrv/dev-myproject/slate/vendor/bundle/ruby/2.7.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:58:in `autodetect': Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
[vt_media@test-db-xgame-01 slate]$ bundle exec middleman servertimed out waiting for input: auto-logout