The shell function is working properly when executed manually in the console, but an error is occurring when it is being executed by JavaScript.

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There could be a few reasons why this is happening.

First, check if the proper permissions are set for the script or the file that the shell function is trying to execute. Make sure that the user running the JavaScript code has the required permissions to execute the shell command.

Second, try to reproduce the error by running the JavaScript code in a console or terminal. This may provide more insight into what is causing the error.

Third, make sure that any variables or inputs required by the shell function are properly passed in to the function when it is executed by JavaScript.

Finally, it is possible that there may be a specific syntax or formatting issue with the shell command when executed by JavaScript. Try testing different variations of the command syntax to see if this resolves the issue.