Product Landing Page Help - User Story #12

My codepen should be here:

I pass all tests except for User Story #12. I get this error message:

“The action attribute’s value should be a url (http…) : object tested must be an array, a map, an object, a set, a string, or a weakset, but htmlinputelement given”

I have my action attribute value set as the mock url given in the instructions. so i’m not sure what’s going wrong. I’ve tried searching the forum but with no luck in regard to this specific error. Not sure how I can fix this, so any help is appreciated!