Welcome to the ODK forum, @Anoop_Dwivedi! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a picture as your avatar because it helps build community!
I'm sorry to hear you are having this issue. Please note that Aggregate is no longer being supported. Central is now the ODK server. The post below has for more details about the end-of-life for Aggregate.
However, someone on the forum may still be able to help you.