title: Domino 9.01 FixPack 4 CKEditor error
body: <p>We've upgraded our Domino Server to FP4 and since then we are facing some issues regarding RichText-Fields. Those fields seem to be broken and can not be loaded. This leads to the problem, that on some pages our buttons do not work as long as there is a RichText-Field.</p>
  
  <p>Our field looks like this (no actions):</p>
  
  <p><a href="https://i.stack.imgur.com/q2IqM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/q2IqM.png" alt="enter image description here"></a></p>
  
  <p>I'm already using this field in an empty Xpage with the following code:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
     &lt;xp:view xmlns:xp="http://www.ibm.com/xsp/core"&gt;
        &lt;xp:button value="Label" id="button1"&gt;
           &lt;xp:eventHandler event="onclick" submit="true" refreshMode="complete"&gt;
              &lt;xp:this.action&gt;
                 &lt;xp:saveDocument&gt;&lt;/xp:saveDocument&gt;
              &lt;/xp:this.action&gt;
           &lt;/xp:eventHandler&gt;
        &lt;/xp:button&gt;
        &lt;xp:br&gt;&lt;/xp:br&gt;
        &lt;xp:inputRichText id="inputRichText1"&gt;&lt;/xp:inputRichText&gt;
     &lt;/xp:view&gt;
  </code></pre>
  
  <p>But also on this simple page the field does not work and the code of the button does not work either. I can only see this error in the browser console:</p>
  
  <p><a href="https://i.stack.imgur.com/Z1x7B.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Z1x7B.png" alt="enter image description here"></a></p>
  
  <p>But I don't know what exactly causes this problem? On some of your databases everything works fine, but with others we have this shown effect. I know that this seems to be an issue with FP4, but I could not find any solution for our problem yet.</p>
  
  <p>I've already disabled "runtime optimized JS and CSS", with no effect.</p>
  
  <p>So can anybody give me a hint here?</p>