title: Apostrophe site giving CKEditor "editor-plugin-required" error
body: <p>My apostrophe-rich-text widgets give me a <code>editor-plugin-required. {plugin: "toolbar", requiredBy: "clipboard"}</code> error in the console. I'm trying to add 'Bold' to the toolbar and it shows up, but when I click it nothing happens.</p>
  
  <p>Additionally, the node_modules folder is gone from my local application and github repo. I'm fairly new to node, so I'm not sure if that's normal, but I'm pretty sure it was there during production. I don't have any modules that extend the apostrophe-areas module, so I'm not sure where the error is coming from.</p>
  
  <p>How can I get the error to go away and the toolbar to actually make changes?</p>