Time Assistant AI Agent unable to create timesheet

Summary: We can see the AI Agent Time assistant , copy it and create a new template. We tried using it by uploading a csv file. Looks like the AI agent runs successfully till the Save Time Card business object funtion and then errors with the below message

Output:

{
"title" : "Bad Request",
"status" : "400",
"o:errorDetails" : [ ]
}

Version : 26A

Any inputs on the above.