Acme Storefront

Checkout — apply promo code

Rejected

Build v2.4.1-rc3·Tested by Dami Oyelaran·2026-09-18 14:02·6m 41s·Chrome 131 · macOS · 1440×900

✕ Rejected by Dami Oyelaran · 2026-09-18 14:09

Promo codes don't apply at all — the API returns 500 and the cart total never changes. The Apply button also gets stuck disabled after navigating away and back.

Checklist passed2/41 failed · 1 not run

What went wrong

Tester notes3

major
Discount never applies — the total stays at £48.00 and "Something went wrong" shows under the field.
minor
Apply button stays disabled after navigating away and back — have to refresh to retry.
cosmetic
Promo field placeholder is cut off on narrower widths.

Errors2 unique · 3 total

TypeError: Cannot read properties of undefined (reading 'total')×2
first at· applyDiscount assets/cart-8f2a1c.js:341:27
Error: Request failed with status 500
first at· fetchJson assets/api-2b91de.js:18:11

Failed requests2 unique · 3 total

POST/api/cart/apply-promo500×2600ms
POSTevents.acme-analytics.io/collectblockedlikely an ad blocker

Steps to reproduce

Reconstructed from clicks & navigation

1
Navigate to /cart
2
Click field “Promo code”
3
Click button “Apply”
4
POST /api/cart/apply-promo → 500×2
5
TypeError: Cannot read properties of undefined (reading 'total')×2
6
Error: Request failed with status 500
7
majorDiscount never applies — the total stays at £48.00 and "Something went wrong" shows under the field.
8
Click button “Apply”
9
Click link “Account”
10
Navigate to /account

Timeline

25 events

0:00
Navigate to /cartpushState
0:02
GET/api/cart20084ms›
GET https://staging.acme-shop.dev/api/cart
HTTP/1.1 200 OK
Request headers
Accept
application/json
Authorization
[REDACTED]
Sensitive headers and fields are redacted in the browser before upload. Response bodies aren't available to extensions.
0:03
info
```
[analytics] page_view /cart
```

0:04

warn

Warning: Each child in a list should have a unique "key" prop. Check the render method of `CartItems`.

Stack traceon /cart

    at CartItems (https://staging.acme-shop.dev/assets/cart-8f2a1c.js:112:9)
    at CartPage (https://staging.acme-shop.dev/assets/cart-8f2a1c.js:204:5)

0:21
Click field “Promo code”input[data-testid="promo-input"]
0:29
Click button “Apply”button[data-testid="apply-promo"]
0:30
log
```
[cart] applying promo SPRING20
```
0:30
POSTevents.acme-analytics.io/collectnet::ERR_BLOCKED_BY_CLIENT›
POST https://events.acme-analytics.io/collect
Request body
{ "event": "promo_apply_clicked" }
Sensitive headers and fields are redacted in the browser before upload. Response bodies aren't available to extensions.
0:30
POST/api/cart/apply-promo500612ms›
POST https://staging.acme-shop.dev/api/cart/apply-promo
HTTP/1.1 500 Internal Server Error
Request headers
Accept
application/json
Content-Type
application/json
Authorization
[REDACTED]
X-Request-Id
req_7Hc2kQ9
Request body
{ "code": "SPRING20", "cartId": "cart_8a1f" }
Sensitive headers and fields are redacted in the browser before upload. Response bodies aren't available to extensions.

0:31

error

TypeError: Cannot read properties of undefined (reading 'total')

Stack traceon /cart

TypeError: Cannot read properties of undefined (reading 'total')
    at applyDiscount (https://staging.acme-shop.dev/assets/cart-8f2a1c.js:341:27)
    at async onApply (https://staging.acme-shop.dev/assets/cart-8f2a1c.js:388:5)

0:31
Screenshot captured automatically on error/cart

0:33

rejection

Error: Request failed with status 500

Stack traceon /cart

Error: Request failed with status 500
    at fetchJson (https://staging.acme-shop.dev/assets/api-2b91de.js:18:11)
    at async applyPromo (https://staging.acme-shop.dev/assets/cart-8f2a1c.js:302:18)

0:58
major
Discount never applies — the total stays at £48.00 and "Something went wrong" shows under the field.
1:20
Click button “Apply”button[data-testid="apply-promo"]
1:21
log
```
[cart] applying promo SPRING20
```
1:21
POST/api/cart/apply-promo500588ms›
POST https://staging.acme-shop.dev/api/cart/apply-promo
HTTP/1.1 500 Internal Server Error
Request headers
Accept
application/json
Content-Type
application/json
Authorization
[REDACTED]
X-Request-Id
req_Pq81xZ2
Request body
{ "code": "SPRING20", "cartId": "cart_8a1f" }
Sensitive headers and fields are redacted in the browser before upload. Response bodies aren't available to extensions.

1:22

error

TypeError: Cannot read properties of undefined (reading 'total')

Stack traceon /cart

TypeError: Cannot read properties of undefined (reading 'total')
    at applyDiscount (https://staging.acme-shop.dev/assets/cart-8f2a1c.js:341:27)
    at async onApply (https://staging.acme-shop.dev/assets/cart-8f2a1c.js:388:5)

2:05
Click link “Account”nav.site-nav > a
2:06
Navigate to /accountpushState
2:07
GET/api/account200132ms›
GET https://staging.acme-shop.dev/api/account
HTTP/1.1 200 OK
Request headers
Accept
application/json
Authorization
[REDACTED]
Sensitive headers and fields are redacted in the browser before upload. Response bodies aren't available to extensions.
2:40
Go back/forward to /cartpopstate
2:41
GET/api/cart20077ms›
GET https://staging.acme-shop.dev/api/cart
HTTP/1.1 200 OK
Request headers
Accept
application/json
Authorization
[REDACTED]
Sensitive headers and fields are redacted in the browser before upload. Response bodies aren't available to extensions.
3:12
Click button “Apply” (disabled)button[data-testid="apply-promo"]
3:30
minor
Apply button stays disabled after navigating away and back — have to refresh to retry.
4:02
cosmetic
Promo field placeholder is cut off on narrower widths.