title: Spring plugin in Eclipse cannot open pom.xml
body: <p>I've installed the most popular plugin in Eclipse (Spring Tools 4.14.1) and i tried to create a new project and open the pom.xml and then it shows error and comes like</p>
  <p><code>Failed to create the part's controls</code></p>
  <p>The error shows like this. Why does this happen? How to fix it?</p>
  <pre><code>java.lang.NoClassDefFoundError: org/eclipse/tm4e/ui/utils/ContentTypeHelper
      at org.eclipse.tm4e.languageconfiguration.LanguageConfigurationCharacterPairMatcher.findContentTypes(LanguageConfigurationCharacterPairMatcher.java:134)
      at org.eclipse.tm4e.languageconfiguration.LanguageConfigurationCharacterPairMatcher.getMatcher(LanguageConfigurationCharacterPairMatcher.java:113)
      at org.eclipse.tm4e.languageconfiguration.LanguageConfigurationCharacterPairMatcher.match(LanguageConfigurationCharacterPairMatcher.java:47)
      at org.eclipse.jface.text.source.MatchingCharacterPainter.paint(MatchingCharacterPainter.java:313)
      at org.eclipse.jface.text.PaintManager.addPainter(PaintManager.java:207)
      ...
  </code></pre>