What does "Error pinging docker server" mean while executing "terraform apply"?

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"Error pinging docker server" typically means that Terraform is unable to communicate with the Docker server. This could be due to an issue with the Docker server configuration, network connectivity, or security settings. It's important to review the error message and associated logs to identify the root cause and take appropriate steps to resolve the issue. Possible solutions could include restarting the Docker service, verifying network settings, or adjusting security policies to allow communication between Terraform and the Docker server.