Error running custom script

I tried to run a bash script with Linux on my ubuntu VM and it has failed with the following error.

{
"status": "Failed",
"error": {
"code": "DeploymentFailed",
"message": "At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.",
"details": [
{
"code": "Conflict",
"message": "{\r\n \"status\": \"Failed\",\r\n \"error\": {\r\n \"code\": \"ResourceDeploymentFailure\",\r\n \"message\": \"The resource operation completed with terminal provisioning state 'Failed'.\",\r\n \"details\": [\r\n {\r\n \"code\": \"VMExtensionProvisioningError\",\r\n \"message\": \"VM has reported a failure when processing extension 'CustomScript'. Error message: \\\"Enable failed: failed to execute command: command terminated with exit status=127\\n[stdout]\\n\\n[stderr]\\nsh: 0: Can't open script.sh\\n\\\"\\r\\n\\r\\nMore information on troubleshooting is available at https://aka.ms/VMExtensionCSELinuxTroubleshoot \"\r\n }\r\n ]\r\n }\r\n}"
}
]
}
}