VM has reported a failure when processing extension 'Microsoft.Insights.VMDiagnosticSettings' for RedHat 7.7

Please find attached the configuration which I've used in my ARM Template to enable Diagnostic in RedHat7.7 VM and I've followed guidelines from :- "https://github.com/Azure/azure-linux-extensions/blob/master/Diagnostic/virtual-machines-linux-diagnostic-extension-v3.md"

Please find below few information that might help
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VM - RedHat 7.7
VM Deployment Status - Newly Created using same ARM Template
Storage Account Deployment Status - Newly Created using same ARM Template

My ARM Template first create a storage account, then the vm and then execute diagnostic extension.
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Now the problem is my ARM Template is executing and all the resources are being created successfully even in the portal I can see Boot Diagnostics & VM Diagnostics is enabled with added parameters/rules for newly created VM but still at the end of ARM Template execution it is throwing me an error as below -

{
"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 'Microsoft.Insights.VMDiagnosticSettings'. Error message: \"Extension operation Enable failed:'NoneType' object has no attribute 'get_fluentd_syslog_src_config'\"\r\n\r\nMore information on troubleshooting is available at https://aka.ms/VMExtensionLinuxDiagnosticsTroubleshoot "
}
]
}
}

Please help me to resolve this exception and make the template error free template. Thank you.
[Diagnostics.txt](https://github.com/Azure/azure-linux-extensions/files/4052392/Diagnostics.txt)