Follow these steps to confirm the error and fix the configuration:

1. Connect to the EC2 instance
   Use SSH to connect to one of the affected worker nodes.
   
   
2. Check the cloud-init logs for parsing errors
   Look for messages similar to the following in /var/log/cloud-init.log or related cloud-init files, which confirm cloud‑init couldn’t process the user data script:
   
   
   • unexpected EOF while looking for matching '"'
   • syntax error: unexpected end of file
   • Warnings about scripts-user failing to run
     
     
3. Check the instance boot logs
   Review /var/log/messages or /var/log/cloud-init-output.log to see which part of the script caused the failure.
   
   
4. Verify your parameter configuration
   Make sure the following settings are correct for your node group as even a single stray quote in user data can prevent cloud‑init from completing.:
   1. Labels
   2. AMI
   3. IP configuration
   4. User data formatting
      
      
5. Validate the user data script

   Ensure the script is executable and contains no unclosed quotes, invalid characters, or incomplete blocks. If you’re using a multiline heredoc, confirm it uses matching delimiters.