Angular Portal Error Type Error: Cannot read properties of undefined (reading ColumnName)

When we are trying to add columns in the angular portal 9.0 using IClientProperty Interface (Sample Identity component similar as shown in the videos), the project is getting compiled without any error. But we are getting the below error when we try to load the same page in Portal.

Type Error: Cannot read properties of undefined (reading ColumnName).

What could be the cause of this error?

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