hi guys, 

experiencing problems with building branches on PR(add, edit, merge, etc.)

Any way I can see the reason why job not getting executed? 

Webhook tuned up to: 
http://JENKINS_URL/bitbucket-hook/
I can't see job running, however, webhook is executed and got reply: "OK"
 
In this documentation I see Pipeline Tab, however I can't see it in my configuration:
https://wiki.jenkins.io/display/JENKINS/Bitbucket+Push+And+Pull+Request+Plugin
 
Should I install anything else?