Exporting to OWL does not work.
When clicking "Export to OWL", nothing happens and the following trace is logged to the console.
SemanticWebInterface.js:1232 Uncaught TypeError: Cannot read property 'getParent' of null at Object.exportDiagram (SemanticWebInterface.js:1232) at DiagramApp._export (DiagramApp.js:393) at MenuPanel.handleOpenExportDiagramModal (MenuPanel.js:263) at chainedFunction (createChainedFunction.js:32) at SafeAnchor.handleClick (SafeAnchor.js:82) at HTMLUnknownElement.callCallback (react-dom.development.js:149) at Object.invokeGuardedCallbackDev (react-dom.development.js:199) at invokeGuardedCallback (react-dom.development.js:256) at invokeGuardedCallbackAndCatchFirstError (react-dom.development.js:270) at executeDispatch (react-dom.development.js:561) at executeDispatchesInOrder (react-dom.development.js:580) at executeDispatchesAndRelease (react-dom.development.js:680) at executeDispatchesAndReleaseTopLevel (react-dom.development.js:688) at forEachAccumulated (react-dom.development.js:662) at runEventsInBatch (react-dom.development.js:816) at runExtractedEventsInBatch (react-dom.development.js:824)