MyTimeEvents: Create button not active

Hi,

we are facing a problem with the my time events. I can see the date, choose a time event and see the time. Unfortunately the create button is still inactive even after we choose an event type (tried several and there is quota on the used ones) . Unfortunately I cannot see any errors in the browser / logs. When I create the time events in the backend system they are shown in the Fiori-app.

Any ideas what could be wrong?

Used components:

Gateway:

SAP_BASIS 750 / 0001

SAP_GWFND 750 / 0001

SAP_UI 750 / 0002

UIHR001: 100 / 0004

Backend:

SAP_BASIS 740 / 0012

SAP_GWFND 740 / 0013

GBX01HR 600 / 0004

Regards, Vanessa