Appian AI Designer Plugin Issue

 Hello Everyone!

We are using the AI Designer Plugin to create an AI model. Appian is unable to create a new machine learning model and the Upload Training File process is failing with the alert-

There is a problem with task “Confirm Schema” in the process “New Machine Learning Model”. ERROR:An error occurred while evaluating expression: =awsgettrainingdataschema(pv!csvDoc,pv!record.hasHeaderRow) (Expression evaluation error at function 'awsgettrainingdataschema': ) (Data Inputs)

Amazon recommends users to upload a Windows Comma Separated Values(.csv) file. We have created a file in iOS from scratch and saved it in the same format.

Has anyone faced similar issue? Appreciate your response.