Have another user sign out or wait until there is a license available.

Make sure the box is marked in Security for, Users can view data but cannot make changes, for each view user.
 

1. Open The Financial Edge and select Administration

2. Select Set up system security.

3. Open each of the view users and make sure the box, Users can view data but cannot make changes, is marked. This box is in the middle of the screen on the right side.