Caused by: java.lang.ClassCastException: org.ametys.core.ui.widgets.WidgetsManager cannot be cast to org.ametys.core.ui.AbstractClientSideExtensionPoint
	at org.ametys.core.ui.ClientSideElementDependenciesManager.computeDependencies(ClientSideElementDependenciesManager.java:118)
	at org.ametys.core.ui.ClientSideElementDependenciesManager.computeDependencies(ClientSideElementDependenciesManager.java:102)
	at org.ametys.plugins.core.ui.WorkspaceGenerator.getElementsToSax(WorkspaceGenerator.java:225)
	at org.ametys.plugins.core.ui.WorkspaceGenerator.doGenerate(WorkspaceGenerator.java:172)
	... 54 more