Checkout below wiki page:
https://magento.stackexchange.com/questions/125115/bundle-products-not-adding-to-the-cart-in-magento...
I have tried this. But in my case when I click in the "Add to Cart" button of a bundle product it is not showing any errors. When I click the button, the first product of the product catalog list is added to the cart, even if this product is a bundle product too.
It looks like bundle products are not reading the product ID in the "Add to Cart" button. But I don't know where is this configurations.