Sub-app failed to start: detail
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Stack trace: java.lang.NullPointerException at info.magnolia.ui.vaadin.integration.jcr.AbstractJcrNodeAdapter.getItemProperty(AbstractJcrNodeAdapter.java:170) at info.magnolia.ui.vaadin.integration.jcr.JcrNodeAdapter.getItemProperty(JcrNodeAdapter.java:104) at info.magnolia.ui.form.field.transformer.item.FileTransformer.createPropertyFromItem(FileTransformer.java:175) at info.magnolia.dam.app.ui.field.transformer.AssetTransformer.createPropertyFromItem(AssetTransformer.java:69) at info.magnolia.dam.app.ui.field.transformer.AssetTransformer.createPropertyFromItem(AssetTransformer.java:53) at info.magnolia.ui.form.field.transformer.item.FileTransformer.readFromItem(FileTransformer.java:132) at info.magnolia.ui.form.field.transformer.item.FileTransformer.readFromItem(FileTransformer.java:77) at info.magnolia.ui.form.field.transformer.TransformedProperty.<init>(TransformedProperty.java:64) at info.magnolia.ui.form.field.factory.AbstractFieldFactory.initializeProperty(AbstractFieldFactory.java:282) at info.magnolia.ui.form.field.factory.AbstractFieldFactory.createField(AbstractFieldFactory.java:149) at info.magnolia.ui.dialog.formdialog.FormBuilder.createField(FormBuild