You have deployed SharePoint 2013 and the MySite functionality has been deployed. When you visit your mysite and switch to the My Tasks screen you will see the below error message.
“Sorry, we’re having trouble refreshing your tasks. Contact your administrator if you continue to have problems”
Cause
You will need to enable the Work Management Service App.
Solution
From your SharePoint Central Administration, under the Applications and Manage Service Applications, create a new Service Application for Work Management Service Application.
Hope you find this blog helpful. Do let me know your thoughts below!
This is not the solution.
With certain people in organization its working perfectly