Employees can not add some expenses suddenly

Employees can not add some expenses suddenly

Zoho expense was working fine and whenever there was a new merchant, it would automatically add and also the same auto added in Zoho Books (due to merchant-vendor sync) untill now. From today, it is having problems in searching the existing vendors and also the following error appears when there is a new merchant. Any solution? Please note that there was no permission defined before, and if there is some update, how can I give access to my employees to add merchant from zoho expense same sa before.