Standard bundles - Why am I getting a cart error?
The most common cause of a cart error when using Standard bundles is due to products offered in the bundle not being available in the Online Store Sale Channel.
Note: When using Standard bundles all product offered in the bundle must be available in the Online Store Sales Channel.
For information relating to hiding from products from search & the 'All products' collection see:
How do I hide my dummy products from a Search.
How do I hide my dummy products from the 'All products' collection?