I have a problem where the build status from my jenkins server is not showing in Bitbucket. I have followed every step here: Bitbucket Cloud Build Status Notifier Plugin and I have also added the Bitbucket Oauth plugin.
The system log looks like this: 
It seems like there is something wrong with the build data. I am not an expert and I have followed all the steps as I should, what could the problem be?
Feel free the ask questions if you need more info!
I have the same issue after upgrade Jenkins... I don't know where is the problem, the warning message is at:
https://github.com/jenkinsci/bitbucket-build-status-notifier-plugin/blob/master/src/main/java/org/jenkinsci/plugins/bitbucket/scm/GitScmAdapter.java#L59
Update:
Ok I solve the issue after downgrade Git plugin to 3.9.1
Cheers