HTTP Status 404 - /ODKAggregate

Hello guys, i'm new in ODK Aggregate,
After I installing ODKAggregate On Ubuntu, when i access from browser Like this "" will be display message

HTTP Status 404 - /ODKAggregate
type Status report

message /ODKAggregate

description The requested resource is not available.

ODK Version: ODK Aggregate v1.4.15 linux-x64-installer
Ubuntu Version: Linux 4.4.0-112-generic #135-Ubuntu SMP Fri Jan 19 11:48:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

I try to copy ODKAggregate.war to /opt/tomcat/webapps and create automatically ODKAggregate folder then i try to access from browser display error 404

please help me how to fix that

Closing in favor of HTTP Status 404 - /ODKAggregate