Hello,
When adding an item to the cart, we have encountered the error Parameter Missing or Invalid: Required parameter missing or invalid. But only concerning some products such as these with variants.
Other than here described, the ID is correct
https://shopify.dev/docs/themes/troubleshooting/fix-parameter-missing-or-invalid-errors#:~:text=This%20error%20occurs%20when%20you,code%20to%20the%20W3C%20Validator.
The Theme developer says it its caused by custom codes or apps.
But we didn´t activate new one since the error occurs.
Product page with error: e.g.
Can somebody help out?
Thanks in advance
