I often run into an issue whereby changing the default read-only grid component in a view to an editable grid is not possible for some views but works fine with other views (even within the same table!).
Example (in Classic mode), classic "Editable Grid" and new "Power Apps grid control" (which can be set to be editable) are not in the control list:
In the modern designer, I can select and configure the component, but this error message is shown every time I try to save the view:

Any ideas on how to solve this issue? If not, I would love to at least understand the logic to explain why it works with some views, but not with others.