Error: 'Conversion from type 'Integer' to type 'Date' is not valid'

Received the following error message whilst using the plan:
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​An unexpected error occurred. Please contact your system administrator with the following information: System.InvalidCastException: Conversion from type 'Integer' to type 'Date' is not valid
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This error occurs when importing data to Orchestrate or when refreshing the plan.

The functionality has been enhanced with the deadline date in Orchestrate version 7.62. Please upgrade to this version or above.
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If you would like more information on how this functionality was enhanced, please raise a new case online and reference the title of this article.