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How to fix Jenkins error 403 no valid crumb was included in the request
Jenkins errors can be a hassle, causing frustration and wasted time. One such error is "Jenkins error 403 no valid crumb was included in the request", which can prevent you from using Jenkins. In this article, we will provide simple solutions for resolving Jenkins error 403 no valid crumb was included in the request and getting Jenkins working properly again.
Fixing the Jenkins Error 403 No Valid Crumb was Included in the Request
I recently encountered an issue with Jenkins, where I was greeted with the error message 403 No valid crumb was included in the request. It’s very frustrating when such errors appear, as they can often be difficult to solve. So, in this article I will guide you through the cause and solution to this common Jenkins error.
Cause
There are various causes for the Jenkins error 403 no valid crumb was included in the request, but the two most common ones are with the security settings on your Jenkins and your web browser. If the security settings on Jenkins are configured to prevent requests from unauthorized sources, then this error could be the result. If a different web browser is used when accessing Jenkins, then the request may be considered from a different source and thus, the error occurs.
Solution
The most straightforward solution for the Jenkins error 403 no valid crumb was included in the request is to disable the ‘Prevent Cross Site Request Forgery exploits’ option on the Jenkins configuration page. To do this, log in to your Jenkins account, go to ‘Manage Jenkins’, then select ‘Configure Global Security’ and uncheck the box next to ‘Prevent Cross Site Request Forgery exploits’. This should solve the issue.
It is also recommended to clear the cookies and cache in the browser which you are using to access Jenkins. Doing so will ensure the request is considered from the same source and the error does not occur.
Conclusion
The issue with the Jenkins error 403 no valid crumb was included in the request can be solved by disabling the ‘Prevent Cross Site Request Forgery exploits’ option and clearing the cookies in the web browser. I hope this article was helpful in guiding you through the cause and solution to the problem. If you have any further questions or require any further assistance, please do not hesitate to leave a comment. I will be happy to help.
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Frequently Asked Questions (FAQ)
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When was this error first discovered?Our systems detected the error Jenkins error 403 no valid crumb was included in the request on February 3, 2023, but the error may have been active for some quite time now.
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How can I report this error?You can report error Jenkins error 403 no valid crumb was included in the request by leaving a comment below or by using one of the vendors support channels, if applicable.