try promises

utils.js

@@ -8,6 +8,15 @@ export async function requestTicket (username, password) {
 			"Content-Type": "application/x-www-form-urlencoded"
 		},
 		body: prms.toString()
+	})
+	.then((response) => {
+		if (!response.ok) {
+			throw new Error('Network response was not OK');
+		}
+		return response;
+	})
+	.catch((error) => {
+		console.error('There has been a problem with your fetch operation:', error);
 	});
 	let data = await response.json();
 	return data;