The name of assembly options are used in the API route. Thus, it is necessary to support the encoding of these names so as not to create problems in the URL with special characters, such as "/". When adding an assembly option with "/" in the cart, it simply doesn't get added and also doesn't notify the user.

• Add a "/" into the assembly option name;
• Try adding a product with the assembly option;
• The item will be added to the cart without the assembly option.

Remove "/" from the assembly option name.