After upgrading Jenkins from 2.189 to 2.193 due to security issues none of the jobs I have setup in jenkins to be triggered by the pull-request-notifier is started. There are 2 options the way I see it:

1. some of the changes in Jenkins is breaking the notifier-plugin in Bitbucket, or
2. the implentation in Jenkins doesn't work as intended.

None of the configurations of the 20+ jobs I have that is triggered by this plugin have changed.

Extract from log:
2019-09-04 08:22:33.903+0000 [id=35] WARNING hudson.security.csrf.CrumbFilter#doFilter: Found invalid crumb e55f02079f26ceaa8d7751f38e119adeea156a549c169642bdeeafb4029b0317. Will check remaining parameters for a valid one...
2019-09-04 08:22:33.903+0000 [id=35] WARNING hudson.security.csrf.CrumbFilter#doFilter: No valid crumb was included in request for /job/PKING-pm/buildWithParameters by jenkins. Returning 403.