fn html_err(&self, status: u16, msg: String, i18n_data: Option<&Translator>) -> ApiResponse {
        let err_data = ServerErrorData { status, msg };
        let html = self.build_error_page(err_data, i18n_data);
        // This can construct a 404 if needed
        ApiResponse::err(StatusCode::from_u16(status).unwrap(), &html).content_type("text/html")
    }
Creates an HTML error page for when the initial load handler needs one.

This assumes that the app has already been actually built.

# Panics
This will panic implicitly if the given status code is invalid.
packages/perseus/src/turbine/server.rs