Hi @ritz9650,
I'm so sorry to hear that!
Do you mind sharing the name of the app so that I can look into it further?
Does the app history have any clues?
For recovering lost work, you could try using the historyOffset url param that is described here. For example, adding ?_historyOffset=5 to the end of the url in edit mode, will allow you to "travel back in time" 5 steps. You can increase the number to go further back in time if you still don't see the right data. The idea here is to go back to the most recent working version so you don't have to redo as much work (going back 1000 steps would likely show data, but it could be many, many changes behind). WARNING! If you make any changes to the canvas when traveling back in time with the _historyOffset, that past version will become your present version and it messes with the history, so be careful not to touch anything! Once you find a version that you wan to use, then you can make an edit to the canvas (move a component, add a component, etc) to persist that view.