Workload pie chart is not working

Summary

1. Workload pie chart is not working, it shows an error 

   "The resource /rest/chartplugin/1.0/workloadpie/generate, cannot be found"

   It's not possible to create new Worklog Pie charts as well.

Steps to Reproduce

1. Go to a Dashboard with Workload Pie Chart

Expected Results

The Workload pie chart should be shown

Actual Results

It throws an error in the UI: "The resource /rest/chartplugin/1.0/workloadpie/generate, cannot be found."

Workaround

• Navigate to Project view -> Reports
• Use "Switch Report" drop down list and switch to "All Reports" view if it's not loaded by the default
• Workload Pie Chart Report is available at the bottom of the page, in Others section
• Other reports are available as the workaround to broken Agile gadgets