WORLD REJECT

[cho66x]

My world is rejected with excuses like this,

This version was rejected for reasons outlined below. Please review.
Your application has been rejected for the reasons listed below. Please check guidelines for more details!

• Abnormal results - Service error
• Something else
  App shut down during world entry loading

what is the reason for the refusal? and what should i fix? or what should i review if i made a mistake?