Some changes introduced in Jenkins 2.176.2 and 2.176.3 breaks the features triggering a Jenkins job from Tuleap. Jenkins instances with the CSRF protection enabled (and that have not set hudson.security.csrf.DefaultCrumbIssuer.EXCLUDE_SESSION_ID to true) are impacted.
All requests from Tuleap are rejected with:
HTTP Status code 403 No valid crumb was included in the request
for more information