DataAssets appear blank, showing no variables

After installing the most recent hotfix, I’m following the Game Features tutorial to familiarize myself with plugins in UE5. However, when I try to add a new Action, the DataAsset has no variables I can edit.

I also tried opening the ValleyoftheAncient demo and checking there. Same result.

I can actually edit those properties using the Property Matrix (as shown below)

Any idea about why this is happening?