Azure DevOps Server 2019 Update 1 (Express) -> TF401320 error about Triage - CMMI field

Question

I created a new project in my on premise LAB installation of Azure DevOps Server 2019 Update 1 (Express), with repo TFVC and process template CMMI (predefined).

When I try to save any work item (of any workitem type) or any activity in product backlog, raises error

TF401320: errore nella regola per il campo Valutazione - CMMI. Codice errore: Required, HasValues, LimitedToValues, InvalidEmpty.

translating from italian some like

TF401320: error in rule about field Triage - CMMI. Error code: Required, HasValues, LimitedToValues, InvalidEmpty.

Before saving, when i open edit form to create a new workitem, under column "Planning" appears

Valutazione Non è possibile creare il controllo dell'elemento di lavoro di tipo "FieldControl"

translating from italian some like

Triage Cannot create the control of work item type "FieldControl"

If I create a project with process template Scrum, there is no issue creating any workitem.

Have you any idea or advice?

Thanks in advance