What does the error message "Failed to write to output file" mean when using the "watch" feature of esbuild.js?

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The error message "Failed to write to output file" when using the "watch" feature of esbuild.js means that there was an issue writing the output file to disk. This could be due to a permissions issue, disk space issue, or a file locking issue. It is important to investigate the specific error message and take appropriate actions to resolve the issue.