I have my data in Excel. The column I am pulling data from is formated as date 03/12/2024. If in my data a date is blank, I am getting this error:

Here is my TEXT:
If(IsBlank(varlinkdate),"",Text(DateAdd(varlinkdate,TimeZoneOffset(varlinkdate),TimeUnit.Minutes),"[$-en-US] mm/dd/yyyy","en-US"))
This works perfectly when there is a date in my data, but why do I keep getting that error and how do I fix it?