Hello,
the most fields in our form are set to "required", as well "Veranstalter", only few are optional. Now, for example, if an user saves without an entry in the field "Veranstalter" (=organiser of events, is a required costum field), there is no fault message. Please have a look at the results in attachment (both: "save" and "save an close"
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Thank you, Anke