This issue may arise due to Apple’s requirements and agreements. Before being able to upload the new version of the application, developers need to accept the terms and conditions outlined in Apple’s agreement. I encountered a similar issue, and upon investigation, I realized that accepting the agreement is a crucial step to resolve this problem
You can find at: AppStore> Add new IOS APP + >go to link popup Apple Developer Website and Agree
Apple Developer Website: http://developer.apple.com/membercenter/index.action
When finished, re-upload and it will work!