Mail to the Approver not sent for ITSHOP request.

Hi ,

I am very new to One IDentity .

I am facing an issue . The job got triggered yesterday but the mail was not sent. After approval the mail to the recipient is sent successfully , But the job "VI_ESS_PWOHelperPWO send mail new task for

approver" is not getting triggered. What can be possible solution. Someone please help me.