Can't import workflow from Marketplace

Summary

It's not possible to import workflow from the Marketplace. Go to <instancename>.atlassian.net/plugins/servlet/wfshare-import

Steps to Reproduce

1. Click on settings > Issues
2. Then choose Workflows
3. Click on "Import from Marketplace"
4. The page "Select a workflow" will show up

Expected Results

There would have options of workflows from the Marketplace to browse and download.

Actual Results

An error shows up: "Unable to reach Atlassian Marketplace to browse workflows."