First after creation the leage you must be shure that the leage ID you created is the same with the ID tournament of your leage in fifa in career mode
Second you must copy the calender of any leage that use 10 teams with 4 games
To your leage, donot creat the calender this is that do crash to...
First you must open creation master by your language ,like english ,dont use the first choice (that called open fifa 2015)..
After you creat your team you must make regenerat Bh
Then open your game by language that used in creation master, like english