I installed the b1 integration server.
If I start now the dashboard I got the message.
Error: The requested dashboard does not exist. Dashboard: /com.sap.b1.dashboards/0010000100.sap_dashboard_001.dab001/default.html
If this dashboard is newly imprted, ensure that the SAP Business One EventSender Server has been started; then wait for several minutes and try again.
The service is running. B1 version is B1 8.81. The message is in the widget window not in a message box.