I installed this app in my account: 

https://creator.zoho.com/public/showAppInfo?canvasurl=agxvdppbg&refererUrl=%2Fplatform%2Fpublic%2Fsearch%3FappName%3DIssue%2BManager%26category%3D-1%26count%3D8&refererText=Back%20to%20Search%20Results#readreview

I have opened "support access" to this app:     https://creator.zoho.com/lifengwu/copy-1-of-issue-manager-9-0/#View:All_Issues

The problem is when I try to update an issue, the "update script" fails.  Can you take a look?