Steps to reproduce

1.  Add a category list component with no connection
2.  

.. Logs, screenshots, gifs...

Expected results

.. Justify non-trivial expectations with a link to a doc or a relevant discussion.

Actual results

Throw an exception on browser

2021-07-01 16:34:29,101 ERROR nfo.magnolia.admincentral.AdmincentralErrorHandler: AdmincentralUI has encountered an unhandled exception.2021-07-01 16:34:29,101 ERROR nfo.magnolia.admincentral.AdmincentralErrorHandler: AdmincentralUI has encountered an unhandled exception.java.util.NoSuchElementException: No value present at java.util.Optional.get(Optional.java:135) ~[?:1.8.0_241] at info.magnolia.ecommerce.app.catalogs.chooser.HierarchicalCategoryChooserTreeDataProvider.getConnections(HierarchicalCategoryChooserTreeDataProvider.java:124) ~[magnolia-ecommerce-ui-1.2.5-SNAPSHOT.jar:?] at info.magnolia.ecommerce.app.catalogs.chooser.HierarchicalCategoryChooserTreeDataProvider.getRoot(HierarchicalCategoryChooserTreeDataProvider.java:92) ~[magnolia-ecommerce-ui-1.2.5-SNAPSHOT.jar:?] at info.magnolia.ecommerce.app.catalogs.chooser.HierarchicalCategoryChooserTreeDataProvider.fetchChildrenFromBackEnd(HierarchicalCategoryChooserTreeDataProvider.java:75) ~[magnolia-ecommerce-ui-1.2.5-SNAPSHOT.jar:?] at com.vaadin.data.provider.AbstractBackEndHierarchicalDataProvider.fetchChildren(AbstractBackEndHierarchicalDataProvider.java:66) ~[vaadin-server-8.13.0.jar:8.13.0] at info.magnolia.ecommerce.app.catalogs.chooser.HierarchicalCategoryChooserTreeDataProvider.fetch(HierarchicalCategoryChooserTreeDataProvider.java:64) ~[magnolia-ecommerce-ui-1.2.5-SNAPSHOT.jar:?] at info.magnolia.ui.contentapp.CaptionFilteringDataProviderWrapper.fetch(CaptionFilteringDataProviderWrapper.java:85) ~[magnolia-ui-framework-6.2.9.jar:?] at info.magnolia.ui.contentapp.CaptionFilteringDataProviderWrapper.size(CaptionFilteringDataProviderWrapper.java:100) ~[magnolia-ui-framework-6.2.9.jar:?] at com.vaadin.data.provider.DataCommunicator.getDataProviderSize(DataCommunicator.java:815) ~[vaadin-server-8.13.0.jar:8.13.0]

Workaround

Development notes