I seem to be unable to delete the default "Income" category, after having split it into more granular categories that work better for me.
When pressing the Delete button in the UI, I get the following error:
> Error deleting category, please try again.
The API throws the same:
{"name":"OperationError","message":"Error deleting category, please try again."}
I've made sure that the category is "empty", i.e. it has no transactions linked to it or any rules.