Code macro won't render after upgrading from 2.5 to 3.0

All code macros in the wiki fails with:
Failed to execute the [code] macro
org.xwiki.rendering.macro.MacroExecutionException: Failed to highlight content
at org.xwiki.rendering.internal.macro.code.CodeMacro.parseContent(CodeMacro.java:108)
at org.xwiki.rendering.internal.macro.code.CodeMacro.parseContent(CodeMacro.java:48)
at org.xwiki.rendering.macro.box.AbstractBoxMacro.execute(AbstractBoxMacro.java:146)
at org.xwiki.rendering.macro.box.AbstractBoxMacro.execute(AbstractBoxMacro.java:51)
at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transformOnce(MacroTransformation.java:184)
at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transform(MacroTransformation.java:129)
at org.xwiki.rendering.internal.transformation.DefaultTransformationManager.performTransformations(DefaultTransformationManager.java:72)
at com.xpn.xwiki.doc.XWikiDocument.performSyntaxConversion(XWikiDocument.java:7605)
at com.xpn.xwiki.doc.XWikiDocument.performSyntaxConversion(XWikiDocument.java:7554)
at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:836)
at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:785)
at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:879)
at com.xpn.xwiki.api.Document.getRenderedContent(Document.java:557)
at sun.reflect.GeneratedMethodAccessor308.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:188)
at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:153)
at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:116)
at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1873)
at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1811)
at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:848)
at sun.reflect.GeneratedMethodAccessor103.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:188)
at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:153)
at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:116)
at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:1924)
at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1843)
at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:154)
at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:226)
at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:117)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:129)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:152)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:68)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:218)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:112)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:536)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:915)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:405)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [role = [org.xwiki.rendering.parser.HighlightParser] hint = [default]]
at org.xwiki.component.embed.EmbeddableComponentManager.initialize(EmbeddableComponentManager.java:368)
at org.xwiki.component.embed.EmbeddableComponentManager.lookup(EmbeddableComponentManager.java:126)
at org.xwiki.component.internal.DefaultComponentManager.lookup(DefaultComponentManager.java:85)
at org.xwiki.rendering.internal.macro.code.CodeMacro.highlight(CodeMacro.java:144)
at org.xwiki.rendering.internal.macro.code.CodeMacro.parseContent(CodeMacro.java:105)
... 93 more
Caused by: java.lang.NullPointerException
at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:110)
at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:92)
at org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:64)
at org.xwiki.rendering.internal.parser.pygments.PygmentsParser.initialize(PygmentsParser.java:154)
at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:429)
at org.xwiki.component.embed.EmbeddableComponentManager.initialize(EmbeddableComponentManager.java:361)
... 97 more