Hi everybody,

we're using content apps quite a lot and after update to Magnolia 5.3 (5.3.4) 
editing/adding of items stopped working. I of course followed the instructions 
in release notes to migrate content apps to content connector - I used 
ContentAppMigrationTask - and the result looked correct in config, browsers of 
our custom apps work fine, but when trying to edit an item (or add), one of 
these two cases happens:

[b]1. dialog loads up, but all the values are empty[/b] (no error is shown and 
saving the dialog with new values throws an error)
[b]2. throws an error:[/b]
[code]Sub-app detail failed to start: null
java.lang.NullPointerException  at 
info.magnolia.ui.vaadin.integration.contentconnector.JcrContentConnector.getNewItemId(JcrContentConnector.java:200)
at 
info.magnolia.ui.contentapp.detail.DetailEditorPresenter.start(DetailEditorPresenter.java:118)
at 
info.magnolia.ui.contentapp.detail.DetailEditorPresenter.start(DetailEditorPresenter.java:101)
at info.magnolia.ui.contentapp.detail.DetailSubApp.start(DetailSubApp.java:118)
at info.magnolia.ui.contentapp.detail.DetailSubApp.start(DetailSubApp.java:71)
....[/code]

Has anybody came across this problem or have any idea what the cause could be?

-- 
Context is everything: 
http://forum.magnolia-cms.com/forum/thread.html?threadId=81aea362-59ed-463d-a2fb-9777f4234233


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