Filter the possibility of having a value in a multiple selection list Oracle CX

Summary:

Hello Community, I hope you are well

It is required to validate the choice of a specific value in a multiple selection list, but since it is a list of this nature it can have more than one selected value, which is why the contains() function was being used. When validating the script it does not present errors, but when entering the object where this validation was placed it shows a server error.

What other function can be used to do this validation?

Thanks for your help.

Content (please ensure you mask any confidential information):

Oracle Fusion Cloud Applications, 23D (11.13.23.10.0)