deploy java application 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: java.lang.NoClassDefFoundError: 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.