TYPO3 Core

Clicking the green arrow to send to the next stage often ends up in ExtDirect exceptions. No Window is shown.

#0 /home/www/web1/htdocs/typo3_src/typo3/sysext/workspaces/Classes/ExtDirect/ActionHandler.php(482): Tx_Workspaces_Service_Stages->getPropertyOfCurrentWorkspaceStage(NULL, 'default_mailcom...') 
#1 /home/www/web1/htdocs/typo3_src/typo3/sysext/workspaces/Classes/ExtDirect/ActionHandler.php(445): tx_Workspaces_ExtDirect_ActionHandler->getDefaultCommentOfStage(NULL) 
#2 /home/www/web1/htdocs/typo3_src/typo3/sysext/workspaces/Classes/ExtDirect/ActionHandler.php(155): tx_Workspaces_ExtDirect_ActionHandler->getSentToStageWindow(NULL) 
#3 [internal function]: tx_Workspaces_ExtDirect_ActionHandler->sendToNextStageWindow('tt_content', '253', '135') 
#4 /home/www/web1/htdocs/typo3_src/t3lib/extjs/class.t3lib_extjs_extdirectrouter.php(141): call_user_func_array(Array, Array) 
#5 /home/www/web1/htdocs/typo3_src/t3lib/extjs/class.t3lib_extjs_extdirectrouter.php(86): t3lib_extjs_ExtDirectRouter->processRpc(Object(stdClass), 'TYPO3.Workspace...') 
#6 [internal function]: t3lib_extjs_ExtDirectRouter->route(Array, Object(TYPO3AJAX)) 
#7 /home/www/web1/htdocs/typo3_src/t3lib/class.t3lib_div.php(5260): call_user_func_array(Array, Array) 
#8 /home/www/web1/htdocs/typo3_src/typo3/ajax.php(73): t3lib_div::callUserFunction('t3lib/extjs/cla...', Array, Object(TYPO3AJAX), false, true) 
#9 {main}

Sonja has credentials to the demo installation, otherwise ask me.