The new Rapid Board caters for the users to have cross-projects in it. However, the following error appears if one or more projects are missing the Administer Projects permission.

Project Administrator permissions are required to add a sprint

The solution to this matter is to ensure that the project(s) that are to be included in the sprint has the rightful permission. However, it could be quite troublesome for the user if the are managing a lot of projects. They will have to manually check one by one and it is time consuming.

In this case, rather than just having the message displayed when hovering on the disabled Start Sprint button as mentioned before,
it would be really convenient and better GreenHopper can check on the lack of Project Permission and tell the users know on what projects are missing the Administer Project permission. A suggestion would be something like:

The Administer Project permission(s) are required for the following project(s):
- Project A
- Project B
- Project C