1. I created an EC2 instance and subsequently generated an Amazon Machine Image (AMI) from this instance.

1. I added the EC2 plugin to Jenkins to use this AMI. In the "New Cloud" section, I filled in the following fields:

• • Name
  • Amazon EC2 credentials
  • Region
  • EC2 Key Pair's Private Key
    Upon testing the connection, I received a success response. I then proceeded to the "Add AMI" section.

1. In the "Add AMI" section, I filled in the following fields:

• • Description
  • AMI ID
  • Instance Type (T2XLarge)
  • Security group names
  • Remote FS root
  • Remote user
  • AMI Type
  • Labels
    I selected "Usage = Only build jobs with label expressions matching this node," and filled in Subnet IDs for VPC and Tags. I also checked "Associate Public IP" and chose "Private IP" as the Connection Strategy.

1. When I clicked the "Save" button, I encountered an error message on my screen: "A problem occurred." Upon reviewing the system logs, I identified the error as follows:

• • java.lang.NullPointerException at jenkins.agents.CloudSet.doDoCreate

1. I am using the following versions:

• • Jenkins: 2.414.1
  • Amazon EC2 plugin: Version1648.vf3d852e00486
  • Amazon Web Services SDK :: EC2: Version1.12.633-430.vf9a_e567a_244f
  • Amazon Web Services SDK :: Minimal: Version1.12.633-430.vf9a_e567a_244f
  • Pipeline: Step API: Version639.v6eca_cd8c04a_a_
  • Apache HttpComponents Client 4.x API: Version4.5.14-208.v438351942757
  • AWS Credentials: Version218.v1b_e9466ec5da_
  • Bouncycastle API: Version2.29
  • Command Agent Launcher: Version107.v773860566e2e
  • Credentials: Version1311.vcf0a_900b_37c2
  • Node Iterator API: Version49.v58a_8b_35f8363
  • SSH Credentials: Version308.ve4497b_ccd8f4
  • Trilead API: Version2.84.v72119de229b_7

Could you please assist me in identifying what might be missing or causing this issue? Any guidance or support would be greatly appreciated.