Jenkins fails to boot due to wrong ruby version about aws-cf-templates HOT 4 CLOSED

/var/log/cloud-init-output.log
Cloud-init v. 19.3-3.amzn2 running 'modules:final' at Fri, 03 Sep 2021 22:12:51 +0000. Up 32.12 seconds.
+ /opt/aws/bin/cfn-init -v --stack Jenkins --resource AgentLC --region us-east-2
Error occurred during build: Failed to install gem: aws-sdk-ec2-1.62.0 (return code 1)
+ /opt/aws/bin/cfn-signal -e 1 --stack Jenkins --resource AgentASG --region us-east-2
ValidationError: Stack arn:aws:cloudformation:us-east-2:XXX:stack/Jenkins/7daca480-efca-11ea-yyy-0aa874bc8df2 is in UPDATE_COMPLETE state and cannot be signaled



/var/log/cfn-init.log
021-09-03 21:55:59,220 [ERROR] Gem failed. Output: ERROR:  Error installing aws-sdk-ec2:
        aws-eventstream requires Ruby version >= 2.3.

021-09-03 21:55:59,220 [ERROR] Error encountered during build of setup: Failed to install gem: aws-sdk-ec2-1.62.0 (return code 1)
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 542, in run_config
    CloudFormationCarpenter(config, self._auth_config).build(worklog)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 229, in build
Hangupanges['packages'][manager] = CloudFormationCarpenter._packageTools[manager]().apply(packages, self._auth_config)
sh-4.2$ ls -lapython2.7/site-packages/cfnbootstrap/lang_package_tools.py", line 111, in apply
    if self._install_gem(pkg, ver):
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/lang_package_tools.py", line 155, in _install_gem
    raise ToolError("Failed to install gem: %s-%s" % (pkg, ver), result.returncode)
ToolError: Failed to install gem: aws-sdk-ec2-1.62.0 (return code 1)
2021-09-03 21:55:59,222 [ERROR] -----------------------BUILD FAILED!------------------------
2021-09-03 21:55:59,222 [ERROR] Unhandled exception during build: Failed to install gem: aws-sdk-ec2-1.62.0 (return code 1)
Traceback (most recent call last):
  File "/opt/aws/bin/cfn-init", line 171, in <module>
    worklog.build(metadata, configSets)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 129, in build
    Contractor(metadata).build(configSets, self)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 530, in build
    self.run_config(config, worklog)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 542, in run_config
    CloudFormationCarpenter(config, self._auth_config).build(worklog)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/construction.py", line 229, in build
    changes['packages'][manager] = CloudFormationCarpenter._packageTools[manager]().apply(packages, self._auth_config)
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/lang_package_tools.py", line 111, in apply
    if self._install_gem(pkg, ver):
  File "/usr/lib/python2.7/site-packages/cfnbootstrap/lang_package_tools.py", line 155, in _install_gem
    raise ToolError("Failed to install gem: %s-%s" % (pkg, ver), result.returncode)
ToolError: Failed to install gem: aws-sdk-ec2-1.62.0 (return code 1)

Agents must use Ruby 2.0
root@ip-10-0-37-179 bin]# yum list available ruby
Loaded plugins: extras_suggestions, langpacks, priorities, update-motd
Available Packages
ruby.x86_64               

AWS Eventstream adds:
>  spec.required_ruby_version = '>= 2.3'
see here:
https://github.com/aws/aws-sdk-ruby/blob/a6736ea94dc708bfea6a7099dd11d40931a527a1/gems/aws-eventstream/aws-eventstream.gemspec#L18