Sorry for not getting back earlier.

It seems like you haven't set the bundle name which the build should be added to. The bundle names doesn't seem to be visible in the YouTrack UI anymore - but for Fixed in Build it is often something like Project Name: Builds and you can get them by calling:

http://youtrackserverurl/rest/admin/customfield/buildBundle

I was experiencing the same problem.

I looked into it, and it says that YouTrack deprecated the Bundles on their latest upgrade.

Any chance to change this feature to update a CustomField as this seems to be the native replacement for it. I myself am trying to do just that - use Jenkins to add a new variable to a global enum field.

Thanks,
Itai

Yes - I will hopefully have time to look at this weekend - the bundles does as far as I can see still work - and does get created - they just have an id - so can be difficult to match to the corresponding field)

Code changed in jenkins
User: Erik Zielke
Path:
src/main/java/org/jenkinsci/plugins/youtrack/YouTrackBuildUpdater.java
src/main/java/org/jenkinsci/plugins/youtrack/YouTrackProjectProperty.java
src/main/java/org/jenkinsci/plugins/youtrack/YoutrackCreateIssueOnBuildFailure.java
src/main/java/org/jenkinsci/plugins/youtrack/youtrackapi/Field.java
src/main/java/org/jenkinsci/plugins/youtrack/youtrackapi/YouTrackServer.java
src/main/resources/org/jenkinsci/plugins/youtrack/YouTrackBuildUpdater/config.jelly
src/main/resources/org/jenkinsci/plugins/youtrack/YouTrackBuildUpdater/config.properties
src/main/resources/org/jenkinsci/plugins/youtrack/YouTrackBuildUpdater/help-fieldBuildBundleToUpdate.html
src/test/java/org/jenkinsci/plugins/youtrack/YouTrackBuildUpdaterTest.java
http://jenkins-ci.org/commit/youtrack-plugin/9b985fba1b908779dfd316b93f229df0aa3c4691
Log:
use field name instead of bundle to select which bundle to update - JENKINS-31874

looks like this commit introduced another issue:

when there's no `buildBundle` defined and current build doesn't have fixed issues - then the plugin can't find which buildBundle to use, so it simply does not do anything

I fixed that by going to config.xml for the job and in node <org.jenkinsci.plugins.youtrack.YouTrackBuildUpdater added <bundleName>Builds</bundleName> and removed <fieldBuildBundleToUpdate></fieldBuildBundleToUpdate>

also the plugin reverts the values from config if job configuration is changed via UI