Unable to add Azure AD Auth Context

I’m trying to add Azure AD Auth Context to a self hosted application, I’ve followed the documentation and created the Authentication Context and Conditional Access policies in Azure/Entra ID and then enabled policy sync in Cloudflare.

But when I try to add this into the access policy for the app, it just errors with ‘Error configuring your application: access.api.error.invalid_request: invalid ‘require’ configuration
Error configuring your application: access.api.error.invalid_request: invalid ‘require’ configuration’ and the full event returned is:
{
“result”: null,
“success”: false,
“errors”: [
{
“code”: 12130,
“message”: “access.api.error.invalid_request: invalid ‘require’ configuration”,
“error_chain”: [
{
“message”: “invalid auth_context rule”
},
{
“message”: “missing auth_context ac_id”
}
]
}
],
“messages”:
}

The auth context name I’m using in Cloudflare is identical to the one in Azure AD, but I still can’t get passed this error.