How to hide or remove the "NULL" value in the interview scheduled notification for web conference?

Summary: When i create an interview scheduled for the candidate and set the format to "In person" there is a 'NULL" value in the web conference link portion when receiving the notification by the candidate. Why is a null value was there?

Token use for web conference is ${InterviewSchedulingLocationWebConferenceLink} and for phone is ${InterviewSchedulingLocationPhoneNumber}

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