Attribute Rules and not loading layers

[Ona_Tim]

I have created a Field map app to help in road ratings. I created a project in pro with 2 layers and exported to portal.  On the WISLR Streets I have an attribute rule to update the paser date when the Road rating is updated

When I open it in field maps the layers fail to load.   

The error is as follows:

Domain: com.esri.arcgis.runtime.error

Code: 7018

Description: Arcade expression is invalid.

I have included a screenshot of the attribute rule.

This app will work in portal with no issues.

Thank you for any help

[gis_KIWI4]

@Ona_Tim - Use a calculated expression in the FieldMaps Designer to calculate the now() in the attribute. Remove the attribute rules. 
The calculated fields are a more robust method of calculating fields within fieldmaps. 

https://www.esri.com/arcgis-blog/products/field-maps/field-mobility/common-calculated-expressions-fo...

[Ona_Tim · Accepted solution]

Here is an update.  

Since the Field maps update to 25.2 this has now been working.