Hi  PuzanovsP ,Thanks for your reply. I checked the log and it was Http rendering issue.

When I created a task. In the inbox view I can complete the task but when I try to open that task it gives me a blank page .Same with workflow item.I have admin right and I am using AEM 6.4. Am I missing any such configuration which might open the page. I am new to the tasks, any help would be appre...