[JENKINS-54747] In Multibranch pipeline job configuration shows and hangs

Steps to reproduce:

1. create a multibranch pipeline job giving a git repo

2. click on configure 

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Originally reported by shubham, imported from: In Multibranch pipeline job configuration shows and hangs

• status: Open
  
• priority: Blocker
  
• component(s): cloudbees-folder-plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 1
  
• imported: 20251211-141027
  

Raw content of original issue

Steps to reproduce:

1. create a multibranch pipeline job giving a git repo


2. click on configure 

2 attachments

- [image-2018-11-21-14-59-25-467.png](https://issues.jenkins.io/secure/attachment/45237/image-2018-11-21-14-59-25-467.png)
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- [jenkins.err.log](https://issues.jenkins.io/secure/attachment/45236/jenkins.err.log)