Jenkins Error: 403 No valid crumb was included in the request

Jenkins is an open source automation server written in Java. Jenkins helps to automate the non-human part of the software development process, with continuous integration and facilitating technical aspects of continuous delivery.

Sometimes we may face the following error in Jenkins on using the git pluggin.

403 No valid crumb was included in the request

This can be fixed by tweaking the secutiry configuration of Jenkins.

Step1: Head over to Manage Jenkins

Step2: Select Configure global security

Step3: Uncheck "Prevent Cross Site Request Forgery exploits"

That's all...