Many "unable to resolve class" errors

Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
script14206982675351791039464.groovy: 8: unable to resolve class org.tmatesoft.svn.core.auth.ISVNAuthenticationManager
 @ line 8, column 1.
   import org.tmatesoft.svn.core.auth.ISVNAuthenticationManager;
   ^

script14206982675351791039464.groovy: 9: unable to resolve class org.tmatesoft.svn.core.internal.io.dav.DAVRepositoryFactory
 @ line 9, column 1.
   import org.tmatesoft.svn.core.internal.io.dav.DAVRepositoryFactory;
   ^

script14206982675351791039464.groovy: 10: unable to resolve class org.tmatesoft.svn.core.internal.io.fs.FSRepositoryFactory
 @ line 10, column 1.
   import org.tmatesoft.svn.core.internal.io.fs.FSRepositoryFactory;
   ^

script14206982675351791039464.groovy: 11: unable to resolve class org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryFactoryImpl
 @ line 11, column 1.
   import org.tmatesoft.svn.core.internal.io.svn.SVNRepositoryFactoryImpl;
   ^

script14206982675351791039464.groovy: 12: unable to resolve class org.tmatesoft.svn.core.io.diff.SVNDeltaGenerator
 @ line 12, column 1.
   import org.tmatesoft.svn.core.io.diff.SVNDeltaGenerator;
   ^

script14206982675351791039464.groovy: 22: unable to resolve class SVNRepository 
 @ line 22, column 5.
       def SVNRepository repository = null;
       ^

script14206982675351791039464.groovy: 135: unable to resolve class SVNException 
 @ line 135, column 11.
           } catch (SVNException svne) {
             ^

script14206982675351791039464.groovy: 170: unable to resolve class SVNNodeKind 
 @ line 170, column 25.
               SVNNodeKind nodeKind = repository.checkPath("", -1);
                           ^

script14206982675351791039464.groovy: 178: unable to resolve class SVNException 
 @ line 178, column 11.
           } catch (SVNException svne) {
             ^

script14206982675351791039464.groovy: 208: unable to resolve class SVNException 
 @ line 208, column 11.
           } catch (SVNException svne) {
             ^

script14206982675351791039464.groovy: 244: unable to resolve class SVNRepository 
 @ line 244, column 24.
       public listEntries(SVNRepository repository, String path) throws SVNException {
                          ^

script14206982675351791039464.groovy: 244: unable to resolve class SVNException 
 @ line 244, column 5.
       public listEntries(SVNRepository repository, String path) throws SVNException {
       ^

script14206982675351791039464.groovy: 265: unable to resolve class SVNDirEntry 
 @ line 265, column 25.
               SVNDirEntry entry = (SVNDirEntry) iterator.next();
                           ^

script14206982675351791039464.groovy: 265: unable to resolve class SVNDirEntry 
 @ line 265, column 33.
               SVNDirEntry entry = (SVNDirEntry) iterator.next();
                                   ^

script14206982675351791039464.groovy: 303: unable to resolve class SVNProperties 
 @ line 303, column 23.
           SVNProperties fileProperties = new SVNProperties();
                         ^

script14206982675351791039464.groovy: 303: unable to resolve class SVNProperties 
 @ line 303, column 40.
           SVNProperties fileProperties = new SVNProperties();
                                          ^

script14206982675351791039464.groovy: 312: unable to resolve class SVNNodeKind 
 @ line 312, column 25.
               SVNNodeKind nodeKind = repository.checkPath(filePath, -1);
                           ^

script14206982675351791039464.groovy: 329: unable to resolve class SVNException 
 @ line 329, column 11.
           } catch (SVNException svne) {
             ^

script14206982675351791039464.groovy: 659: unable to resolve class ISVNEditor 
 @ line 659, column 26.
       private void addFile(ISVNEditor editor, String dirPath,
                            ^

script14206982675351791039464.groovy: 659: unable to resolve class SVNException 
 @ line 659, column 5.
       private void addFile(ISVNEditor editor, String dirPath,
       ^

script14206982675351791039464.groovy: 735: unable to resolve class ISVNEditor 
 @ line 735, column 29.
       private void modifyFile(ISVNEditor editor, String dirPath,
                               ^

script14206982675351791039464.groovy: 735: unable to resolve class SVNException 
 @ line 735, column 5.
       private void modifyFile(ISVNEditor editor, String dirPath,
       ^

script14206982675351791039464.groovy: 800: unable to resolve class ISVNEditor 
 @ line 800, column 28.
       private void deleteDir(ISVNEditor editor, String dirPath) throws SVNException {
                              ^

script14206982675351791039464.groovy: 800: unable to resolve class SVNException 
 @ line 800, column 5.
       private void deleteDir(ISVNEditor editor, String dirPath) throws SVNException {
       ^

script14206982675351791039464.groovy: 1084: unable to resolve class SVNDirEntry 
 @ line 1084, column 25.
               SVNDirEntry entry = (SVNDirEntry) spaceIterator.next();
                           ^

script14206982675351791039464.groovy: 1084: unable to resolve class SVNDirEntry 
 @ line 1084, column 33.
               SVNDirEntry entry = (SVNDirEntry) spaceIterator.next();
                                   ^

script14206982675351791039464.groovy: 1098: unable to resolve class SVNProperties 
 @ line 1098, column 39.
                    def fileProperties = new SVNProperties();
                                         ^

script14206982675351791039464.groovy: 1123: unable to resolve class SVNDirEntry 
 @ line 1123, column 25.
               SVNDirEntry entry = (SVNDirEntry) spaceIterator.next();
                           ^

script14206982675351791039464.groovy: 1123: unable to resolve class SVNDirEntry 
 @ line 1123, column 33.
               SVNDirEntry entry = (SVNDirEntry) spaceIterator.next();
                                   ^

script14206982675351791039464.groovy: 1132: unable to resolve class SVNProperties 
 @ line 1132, column 39.
                    def fileProperties = new SVNProperties();
                                         ^