# Known issues & workarounds

- ["Add customer" POS extension no longer works](/barcodify-customer-selector/troubleshooting/known-issues-and-workarounds/add-customer-pos-extension-no-longer-works.md)
- [Expected a valid shop query parameter](/barcodify-customer-selector/troubleshooting/known-issues-and-workarounds/expected-a-valid-shop-query-parameter.md)
- [Something went wrong. Please check your cart or try again.](/barcodify-customer-selector/troubleshooting/known-issues-and-workarounds/something-went-wrong.-please-check-your-cart-or-try-again..md)