Messed up formatting with datagrid 2 widget

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I want to use the data grid 2 widget from the marketplace, but the foramtting is completly messed up when i open the app. I’ve used the widgt before in other projects  and never had any issues and configured it as always. My current Project was a starter Project in the 8.something version that i upgraded to the 9.5.1.  In the pictures you can see how i added the widget and how it looks now in the app. Does anybody has an idea how i can fix this?
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