The "Grey Circle" beside the JIRA Agile Cards is not displayed and no Estimate field displayed in the "View Detail View" on the right panel.
The Story Points custom field is not configured as Global Context or Story is not configured as Chosen Applicable Issue Types.
- Go to JIRA Administration > Issues > Fields > Custom Field.
Find the Story Points custom fields and click on the "Cog" icon then select "Configure".
- Edit the Configuration and set the Context to Global Context or select Story on "Choose Applicable Issue Types".
The default issue types is Epic and Story.
- Click Modify and do a Re-index.