> For the complete documentation index, see [llms.txt](https://galmis.gitbook.io/barcodify-customer-selector/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://galmis.gitbook.io/barcodify-customer-selector/troubleshooting.md).

# Troubleshooting

- [FAQs](https://galmis.gitbook.io/barcodify-customer-selector/troubleshooting/faqs.md)
- [Can I use one scanner to add products and customers?](https://galmis.gitbook.io/barcodify-customer-selector/troubleshooting/faqs/can-i-use-one-scanner-to-add-products-and-customers.md)
- [What scanner should I get for customer barcodes?](https://galmis.gitbook.io/barcodify-customer-selector/troubleshooting/faqs/what-scanner-should-i-get-for-customer-barcodes.md)
- [Known issues & workarounds](https://galmis.gitbook.io/barcodify-customer-selector/troubleshooting/known-issues-and-workarounds.md)
- ["Add customer" POS extension no longer works](https://galmis.gitbook.io/barcodify-customer-selector/troubleshooting/known-issues-and-workarounds/add-customer-pos-extension-no-longer-works.md)
- [Expected a valid shop query parameter](https://galmis.gitbook.io/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.](https://galmis.gitbook.io/barcodify-customer-selector/troubleshooting/known-issues-and-workarounds/something-went-wrong.-please-check-your-cart-or-try-again..md)