Linux – Jenkins EC2 Plugin HTTP error 404

I have an EC2 instance on my AWS account with Jenkins installed don Amazon Linux. The AWS credentials, roles etc. and SSH keys exists so as that the instance has EC2 access and I can SSH to any instance created in the security group etc.

I have installed the EC2 plugin and have configured it as per the instructions, however I get an HTTP 404 error;

Oct 27, 2017 1:26:31 PM null
FINEST: Node jenkins-slave (i-0f8aa5fb0ab29164f)(i-0f8aa5fb0ab29164f) is still pending/launching, waiting 5s
Oct 27, 2017 1:26:36 PM null
FINEST: Node jenkins-slave (i-0f8aa5fb0ab29164f)(i-0f8aa5fb0ab29164f) is still pending/launching, waiting 5s
Oct 27, 2017 1:26:41 PM null
FINEST: Node jenkins-slave (i-0f8aa5fb0ab29164f)(i-0f8aa5fb0ab29164f) is still pending/launching, waiting 5s
Oct 27, 2017 1:26:46 PM null
FINER: Node jenkins-slave (i-0f8aa5fb0ab29164f)(i-0f8aa5fb0ab29164f) is ready
Oct 27, 2017 1:26:46 PM null
INFO: Launching instance: i-0f8aa5fb0ab29164f
Oct 27, 2017 1:26:46 PM null
INFO: bootstrap()
Oct 27, 2017 1:26:46 PM null
INFO: Getting keypair...
Oct 27, 2017 1:26:46 PM null
INFO: Using key: jenkins-slave
d5:dd:51:ac:8b:b3:bf:1b:6f:b4:b1:86:5b:26:14:1e:e0:47:25:72
-----BEGIN RSA PRIVATE KEY-----
MIIEowIBAAKCAQEAoxetaNHULbsbqsThxUSxxxxxxxxxxxxxxxxxxxxxxxxxx
ga2jnJaFOG4M/Fnes9ZzHclz7eflwliFZnhIUJldlSBZ2bvAqdp
Oct 27, 2017 1:26:46 PM null
INFO: Authenticating as ec2-user
Oct 27, 2017 1:26:46 PM null
INFO: Connecting to 10.0.2.51 on port 22, with timeout 10000.
Oct 27, 2017 1:26:47 PM null
INFO: Failed to connect via ssh: There was a problem while connecting to 10.0.2.51:22
Oct 27, 2017 1:26:47 PM null
INFO: Waiting for SSH to come up. Sleeping 5.
Oct 27, 2017 1:26:52 PM null
INFO: Connecting to 10.0.2.51 on port 22, with timeout 10000.
Oct 27, 2017 1:26:52 PM null
INFO: Failed to connect via ssh: There was a problem while connecting to 10.0.2.51:22
Oct 27, 2017 1:26:52 PM null
INFO: Waiting for SSH to come up. Sleeping 5.
Oct 27, 2017 1:26:57 PM null
INFO: Connecting to 10.0.2.51 on port 22, with timeout 10000.
Oct 27, 2017 1:26:57 PM null
INFO: Failed to connect via ssh: There was a problem while connecting to 10.0.2.51:22
Oct 27, 2017 1:26:57 PM null
INFO: Waiting for SSH to come up. Sleeping 5.
Oct 27, 2017 1:27:02 PM null
INFO: Connecting to 10.0.2.51 on port 22, with timeout 10000.
Oct 27, 2017 1:27:03 PM null
INFO: Connected via SSH.
Oct 27, 2017 1:27:03 PM null
INFO: connect fresh as root
Oct 27, 2017 1:27:03 PM null
INFO: Connecting to 10.0.2.51 on port 22, with timeout 10000.
Oct 27, 2017 1:27:03 PM null
INFO: Connected via SSH.
Oct 27, 2017 1:27:03 PM null
INFO: Creating tmp directory (/tmp) if it does not exist
Oct 27, 2017 1:27:03 PM null
INFO: Verifying that java exists
java full version "1.7.0_151-mockbuild_2017_08_09_21_42-b00"
Oct 27, 2017 1:27:03 PM null
INFO: Copying slave.jar
Oct 27, 2017 1:27:03 PM null
INFO: Launching slave agent (via Trilead SSH2 Connection):  java  -jar /tmp/slave.jar


HTTP ERROR 404


Problem accessing /computer/jenkins-slave%20(i-0f8aa5fb0ab29164f)/logText/progressiveHtml. Reason:

    Not Found
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