I'm on JIRA v7.5. I need to be able to allow a particular user to start a sprint. The sprint board has a filter configuration that indicates "The projects in this board cannot be listed because of the complexity of the board filter". I've gone through each of the filters and found all the projects that it references. I've given project admin rights to the user for each of the projects. I also gave the user the "manage sprint" rights and board administrator rights. I did all this based on the many community questions that have been posed.
Even after all this, the user still can't start sprints for the board. What am I missing?