After enabling debugging, I get this addiional information:
Call stack
# 	Function 	Location
1 	require_once() 	JROOT/libraries/cms/component/helper.php:394
2 	JComponentHelper::executeComponent() 	JROOT/libraries/cms/component/helper.php:369
3 	JComponentHelper::renderComponent() 	JROOT/libraries/cms/application/site.php:191
4 	JApplicationSite->dispatch() 	JROOT/libraries/cms/application/site.php:230
5 	JApplicationSite->doExecute() 	JROOT/libraries/cms/application/cms.php:265
6 	JApplicationCms->execute() 	JROOT/index.php:49 