OIDC token issue - same code works in Azure Functions

Hello,
really enjoying Static Web Apps, but I have run into an issues and I am not sure what my issue is, I am trying to get a React/Static Web App with Auth0 authentication working. It all work perfectly on my machine, however when I deploy to Static Web Apps I get "secret or public key must be provided" when calling the API with the correct Bearer Token.
I have deployed the same code to Azure Functions in both Linux and Windows and it works fine.

Static Web App repo - https://github.com/OpenSaasAU/azure-webapps-auth0-api
Deployed app - https://auth0-webapp-test.opensaas.com.au

Function App code which is working fine when deployed to a Azure Function - https://github.com/OpenSaasAU/azure-function-auth0-api
Deployed Azure Function - https://opensaas-auth0-function.azurewebsites.net/api/GetMessage

The setting are identical between both, I am just not getting much info from Static Web Apps to know what is happening.
Thanks