"VM has reported a failure when processing extension 'vm0-dfinstallGW'

[101-vms-with-private-selfHostIR](https://github.com/Azure/azure-quickstart-templates/tree/master/101-vms-with-selfhost-integration-runtime)

### Issue Details
{
"status": "Failed",
"error": {
"code": "ResourceDeploymentFailure",
"message": "The resource operation completed with terminal provisioning state 'Failed'.",
"details": [
{
"code": "VMExtensionProvisioningError",
"message": "VM has reported a failure when processing extension 'vm0-dfinstallGW'. Error message: \"Command execution finished, but failed because it returned a non-zero exit code of: '1'. The command had an error output of: ' CategoryInfo : OperationStopped: (Failed to run p...1.MoveNext( \r\n )\r\n.:String) [], RuntimeException\r\n + FullyQualifiedErrorId : Failed to run process: exitCode=-2146233088, err \r\n Variable=, errContent=, outContent=Failed to execute the c...' For more information, check the instance view by executing Get-AzVmssVm or Get-AzVm (https://aka.ms/GetAzVm). These commands can be executed using CloudShell (https://aka.ms/CloudShell)\"\r\n\r\nMore information on troubleshooting is available at https://aka.ms/VMExtensionCSEWindowsTroubleshoot "
}
]
}
}

### Repro steps (*if necessary, delete otherwise*)
1. Pre-provisioned Data Factory instance, VNET and Subnet
2. [101-vms-with-private-selfHostIR](https://github.com/Azure/azure-quickstart-templates/tree/master/101-vms-with-selfhost-integration-runtime) >> [Deploy to azure](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2FAzure%2Fazure-quickstart-templates%2Fmaster%2F101-vms-with-selfhost-integration-runtime%2Fazuredeploy.json) - by fill in the information.

Start with 101-vms-with-selfhost-integration-runtime/azuredeploy.json and reproduce the deployment using the listed Data Factory, VNET, and subnet prerequisites. Inspect the vm0-dfinstallGW extension failure and its Azure instance view; done means identifying and addressing the cause of the non-zero exit code.

Written by the indexing model from the issue text.