Getting Error if I click on “Mark Attendance” in Shift Type

Information about bug

AttributeError: ‘NoneType’ object has no attribute ‘date’
Possible source of error: hrms (app)

The attendance button worked worked just Fine for my other shifts but on a specific shift its giving the error

I have opened a issue on github to but Its been two days and there is no response on it.
I have provided the whole stack trace on the github please If someone could help me on this issue it will be very appreciated

Link to github issue: