Enable Expenses from email receipts

Hi Team,

We have enabled the "expenses from email receipts" feature but  getting the error message by sender.

Error message is...

"Attention: Can't Process Your Receipt

Can't Create Expense

I can't process the receipt that you submitted on xx-xx. Contact your administrator to check your privileges."

I tried assigning "Travel Manager" role but after assigned also still we have facing this error message.

what could be the reason?

Thank you in advance.