You need to change the permissions in both sections which could be found in Administration -> Permissions:
1. Permissions by Sections
2. Permissions by Roles or Users
Please review the video
I have recorded.
The files you have sent have been deleted. If the problem still persist could you please open a support ticket and send us a link to your web site and backend credentials.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items