SaaS Accelerator Working Locally but Fails After Publishing to Azure Marketplace

Hi Team,

I have successfully installed the SaaS Accelerator using Azure CLI, and it is working fine locally — including access to both the Admin site and the Landing site.

However, when I publish the same code to the Azure Marketplace (SaaS offer), it throws an error, as shown in the attached screenshot:


Things I've Already Checked:
I have created a new client secret.

The new secret has been added to Azure Key Vault.

I have also updated the application site configuration with the latest secret.

Issue:
After deployment to the SaaS Marketplace, the application fails to load as expected, even though it works locally. This suggests an issue possibly related to:

Marketplace callback handling

App registration permissions

Configuration mismatch between local and published environments

Key Vault or Managed Identity access in the Marketplace environment

Request:
Could you please help guide me on how to troubleshoot or resolve this issue? Any suggestions or known configuration steps specific to Marketplace publishing would be greatly appreciated.