Find Date Difference between input date and today

Dear,
I am facing an issue to find the date difference in days when comparing with today’s date.

Please need your input.

I am using this FEEL expression > (i2 - date and time(string(today()))) .days > 14
which end up with below error:

FEEL/SCALA-01008 Error while evaluating expression: failed to evaluate expression ‘(i2 - date and time(string(today()))) .days > 14’: ValError(expected Context or List of Contextes but found ‘ValNull’) is not comparable

However, (i2 - i1) .days > 14 and (i2 - date and time(“2022-12-01T12:00:00”) ).days > 14 work fine.