Hello Umbracians. I have a problem.

Im creating a custom propertyeditor with a few prevalue fields. One of them is a number field that i need to be required. I´ve managed to add the validation type "Required" and it works just fine (the editor cannot be saved without a number value) but i want to show my custom errormessage. What do i add to get this?

This is my prevalue field:

        fields: [
                        {
                            label: "Max number",
                            description: "Max number.",
                            key: "maxNumber",
                            view: "number",
                            validation: [
                            {
                                type: "Required",
                                errorMessage: "Custom message", <-- Did not work
                                errorMsg: "Custom message", <-- Did not work
                                message: "Custom message", <-- Did not work
                            }
                            ]
                        },

All the above gives me this generic error message:

Hope anyone can help!