FrameworkEvent ERROR

org.osgi.framework.BundleException: Could not resolve module: org.eclipse.wst.server.preview [777]
  Unresolved requirement: Require-Bundle: org.eclipse.jetty.servlet; bundle-version="[9.4.7,10.0.0)"
    -> Bundle-SymbolicName: org.eclipse.jetty.servlet; bundle-version="9.4.9.v20180320"
       org.eclipse.jetty.servlet [363]
         Unresolved requirement: Import-Package: org.eclipse.jetty.http; version="[9.4.9,9.4.10)"
           -> Export-Package: org.eclipse.jetty.http; bundle-symbolic-name="org.eclipse.jetty.http"; bundle-version="9.4.9.v20180320"; version="9.4.9"; uses:="org.eclipse.jetty.io,org.eclipse.jetty.util,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.resource"
              org.eclipse.jetty.http [355]
                Unresolved requirement: Import-Package: org.eclipse.jetty.io; version="[9.4.9,9.4.10)"
                  -> Export-Package: org.eclipse.jetty.io; bundle-symbolic-name="org.eclipse.jetty.io"; bundle-version="9.4.9.v20180320"; version="9.4.9"; uses:="javax.net.ssl,org.eclipse.jetty.util,org.eclipse.jetty.util.annotation,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.thread"
                     org.eclipse.jetty.io [357]
                       Unresolved requirement: Import-Package: org.eclipse.jetty.util.annotation; version="[9.4.9,9.4.10)"
                         -> Export-Package: org.eclipse.jetty.util.annotation; bundle-symbolic-name="org.eclipse.jetty.util"; bundle-version="9.4.9.v20180320"; version="9.4.9"
                            org.eclipse.jetty.util [365]
                              Unresolved requirement: Require-Capability: osgi.serviceloader; filter:="(osgi.serviceloader=org.eclipse.jetty.util.security.CredentialProvider)"; resolution:="optional"; cardinality:="multiple"
                              Unresolved requirement: Require-Capability: osgi.extender; filter:="(osgi.extender=osgi.serviceloader.processor)"
                       Unresolved requirement: Import-Package: org.eclipse.jetty.util; version="[9.4.9,9.4.10)"
                         -> Export-Package: org.eclipse.jetty.util; bundle-symbolic-name="org.eclipse.jetty.util"; bundle-version="9.4.9.v20180320"; version="9.4.9"; uses:="javax.servlet,javax.servlet.http,org.eclipse.jetty.util.annotation,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.resource,org.eclipse.jetty.util.thread"
                Unresolved requirement: Import-Package: org.eclipse.jetty.util; version="[9.4.9,9.4.10)"
                  -> Export-Package: org.eclipse.jetty.util; bundle-symbolic-name="org.eclipse.jetty.util"; bundle-version="9.4.9.v20180320"; version="9.4.9"; uses:="javax.servlet,javax.servlet.http,org.eclipse.jetty.util.annotation,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.resource,org.eclipse.jetty.util.thread"
  Unresolved requirement: Require-Bundle: org.eclipse.jetty.security; bundle-version="[9.4.7,10.0.0)"
    -> Bundle-SymbolicName: org.eclipse.jetty.security; bundle-version="9.4.9.v20180320"
       org.eclipse.jetty.security [359]
         Unresolved requirement: Import-Package: org.eclipse.jetty.http; version="[9.4.9,9.4.10)"
           -> Export-Package: org.eclipse.jetty.http; bundle-symbolic-name="org.eclipse.jetty.http"; bundle-version="9.4.9.v20180320"; version="9.4.9"; uses:="org.eclipse.jetty.io,org.eclipse.jetty.util,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.resource"
  Unresolved requirement: Require-Bundle: org.eclipse.jetty.xml; bundle-version="[9.4.7,10.0.0)"
    -> Bundle-SymbolicName: org.eclipse.jetty.xml; bundle-version="9.4.9.v20180320"
       org.eclipse.jetty.xml [368]
         Unresolved requirement: Import-Package: org.eclipse.jetty.util; version="[9.4.9,9.4.10)"
           -> Export-Package: org.eclipse.jetty.util; bundle-symbolic-name="org.eclipse.jetty.util"; bundle-version="9.4.9.v20180320"; version="9.4.9"; uses:="javax.servlet,javax.servlet.http,org.eclipse.jetty.util.annotation,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.resource,org.eclipse.jetty.util.thread"
  Unresolved requirement: Require-Bundle: org.eclipse.jetty.io; bundle-version="[9.4.7,10.0.0)"
    -> Bundle-SymbolicName: org.eclipse.jetty.io; bundle-version="9.4.9.v20180320"
  Unresolved requirement: Require-Bundle: org.eclipse.jetty.server; bundle-version="[9.4.7,10.0.0)"
    -> Bundle-SymbolicName: org.eclipse.jetty.server; bundle-version="9.4.9.v20180320"
       org.eclipse.jetty.server [361]
         Unresolved requirement: Import-Package: org.eclipse.jetty.http; version="[9.4.9,9.4.10)"
           -> Export-Package: org.eclipse.jetty.http; bundle-symbolic-name="org.eclipse.jetty.http"; bundle-version="9.4.9.v20180320"; version="9.4.9"; uses:="org.eclipse.jetty.io,org.eclipse.jetty.util,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.resource"
  Unresolved requirement: Require-Bundle: org.eclipse.jetty.http; bundle-version="[9.4.7,10.0.0)"
    -> Bundle-SymbolicName: org.eclipse.jetty.http; bundle-version="9.4.9.v20180320"
  Unresolved requirement: Require-Bundle: org.eclipse.jetty.util; bundle-version="[9.4.7,10.0.0)"
    -> Bundle-SymbolicName: org.eclipse.jetty.util; bundle-version="9.4.9.v20180320"
  Unresolved requirement: Require-Bundle: org.eclipse.jetty.webapp; bundle-version="[9.4.7,10.0.0)"
    -> Bundle-SymbolicName: org.eclipse.jetty.webapp; bundle-version="9.4.9.v20180320"
       org.eclipse.jetty.webapp [367]
         Unresolved requirement: Import-Package: org.eclipse.jetty.http; version="[9.4.9,9.4.10)"
           -> Export-Package: org.eclipse.jetty.http; bundle-symbolic-name="org.eclipse.jetty.http"; bundle-version="9.4.9.v20180320"; version="9.4.9"; uses:="org.eclipse.jetty.io,org.eclipse.jetty.util,org.eclipse.jetty.util.component,org.eclipse.jetty.util.log,org.eclipse.jetty.util.resource"

	at org.eclipse.osgi.container.Module.start(Module.java:444)
	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1682)
	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1661)
	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1624)
	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1555)
	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)