deploy java app to gcp app engine with maven

I need help with deploying my java applicatin to google cloud plattform, I get this error when I run "mvn clean package appengine:deploy", error: Error: Unable to initialize main class Main Caused by: [login to view URL]: org/telegram/telegrambots/meta/exceptions/T.... I want to deploy a executable jar file, I successfully deployed my jar file but when I run it locally it get that error, meaning my application will not run in the cloud.