What platform are you using, desktop/android/web ? Does it pass through the loading or show any error? What is your system configuration. We can try to help reach us on projectworldofsisters@gmail.com
We have spend some time investigating and we created a new .apk build that could work: "World of Sisters 0.13.6 ANDROID (TEST 21)" Please give us a feedback if it does, thank you very much!