Show one entity data in other

I am using mendix 8.18.1 version and was doing the rapid crash course given in mendix academy, I have taken several entities and I want to show the data of Shift entity in the Planning_Period entity, I  have taken 2 buttons 1 for making new shifts and other for planning shifts for which I have created the microflow I have used the calendar widget to show the shifts which I will be create using that Plan shift button which is using microflow but I am getting this error that  “Contact to your System Administrator”   And I am getting this Type of runtime errors .   Can anyone help me out?
1 answers

Hi Samarpita,
              Please open the error showed in last line of the screenshot you have added. PlanningPeriod_NewEdit.. You will find what exactly the error is.