All the other properties seem fine. Its just date that’s being a problem.
The full error is
"
This record has 1 error(s) in 1 place(s) .
Source— Invalid expression or reference: For literal Date/Time/DateTime values, enclose the value in double quotes; for property references, prefix the expression with an equals sign
I don’t have an actual answer for you on the cause, but it used to be a phenomenon on lower Pega versions. You can raise a ticket with them for more details.