FitNesse For Appian: Error while Populating field - A value is required

I have written script to populate text/paragraph fields in a Form using following syntax:

|populate field|<FIELD_NAME>|with|VALUES|

This syntax is working properly. Values are entered in respective field names but when submitting the form, it seems the webpage is not recognizing the given input in text fields.

validation message is displayed : A value is required.

 

This error is appearing randomly. i.e. sometimes script is working fine but sometimes, the page is not validating the given input.

 

Any solution for this error?

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