You need to belong to a Group with the Publish to GroupShare permission granted to be able to perform operations at the GroupShare step.
Procedure
To assign the Publish to GroupShare permission to a Group:
- In the navigation pane, click Setup.
- In the Setup navigation tree, expand Users and Groups and then click Groups.
- In the Groups work area, click the group to which you wish to assign the Publish to GroupShare permission.
- In the selected group, click the Edit Permissions button on the TMS Ribbon.
- In the Edit Permissions page, expand Users and select the Allow checkbox next to Publish to GroupShare.
- When finished, click Submit on the TMS Ribbon.