Password Reset Not working in 18.4

Hi Team,

Password reset is not working in 18.4 (on-premise) , getting the below error in App server logs. Please help with a solution.

[ThreadPoolTaskExecutor-2076] ERROR com.appiancorp.process.workpoller.WorkItemListener - The following exception occurred while attempting to complete work item [(WorkId: 34, WorkType: MailRequest{subjectWithoutPrefix=, subject=Appian 18.4 - ******************** Change, body=MailBody{filename=/ntf/emailHtml/resetPassword_emailHtml.jsp},, toUsernames=[],}, Response: null, ServerName: notifications-email)] - Exception: com.appiancorp.process.engine.EmailBodyException: Email body failed to render: MailBody{filename=/ntf/emailHtml/resetPassword_emailHtml.jsp}
at java.util.concurrent.ThreadPoolExecutor.runWorker(
at java.util.concurrent.ThreadPoolExecutor$

Already checked this KB and no luck with that step.

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