You can face some issues with photo uploads during the usage of component:
These issues are mostly due to some limitations on the server side and that is why some big pictures cannot be uploaded as there is not enough memory for this process. Also the possible issue could be image library used for photos manipulation and it is missing on the server (GD or Imagemagick).
In most cases upload issues can be solved fixing the limits in php.ini file. Also permissions should be checked. The following articles will help you to solve these issues:
Open Control Panel > Components > NorrCompetition > Options > Images tab.