Why is my add to cart button on Dawn theme spinning endlessly?

[clobberclub]

My add-to-cart button is broken; it just spins forever. https://clobberclub.com/products/07-08-man-city-home-replica-retro-football-shirt

I have tried changing the product-form.js but have been unable to rectify the error. I see in the console the following is causing the bug:

I don't really know what else to try.

Here is my product-form.js for reference

if (!customElements.get('product-form')) {
customElements.define('product-form', class ProductForm extends HTMLElement {
constructor() {
super();

this.form = this.querySelector('form');
this.form.querySelector('[name=id]').disabled = false;
this.form.addEventListener('submit', this.onSubmitHandler.bind(this));
this.cart = document.querySelector('cart-notification') || document.querySelector('cart-drawer');
this.submitButton = this.querySelector('[type="submit"]');
if (document.querySelector('cart-drawer')) this.submitButton.setAttribute('aria-haspopup', 'dialog');
}

onSubmitHandler(evt) {
evt.preventDefault();
if (this.submitButton.getAttribute('aria-disabled') === 'true') return;

this.handleErrorMessage();

this.submitButton.setAttribute('aria-disabled', true);
this.submitButton.classList.add('loading');
this.querySelector('.loading-overlay__spinner').classList.remove('hidden');

const config = fetchConfig('javascript');
config.headers['X-Requested-With'] = 'XMLHttpRequest';
delete config.headers['Content-Type'];

const formData = new FormData(this.form);
if (this.cart) {
formData.append('sections', this.cart.getSectionsToRender().map((section) => section.id));
formData.append('sections_url', window.location.pathname);
this.cart.setActiveElement(document.activeElement);
}
config.body = formData;

fetch(`${routes.cart_add_url}`, config)
.then((response) => response.json())
.then((response) => {
if (response.status) {
this.handleErrorMessage(response.description);

const soldOutMessage = this.submitButton.querySelector('.sold-out-message');
if (!soldOutMessage) return;
this.submitButton.setAttribute('aria-disabled', true);
this.submitButton.querySelector('span').classList.add('hidden');
soldOutMessage.classList.remove('hidden');
this.error = true;
return;
} else if (!this.cart) {
window.location = window.routes.cart_url;
return;
}

this.error = false;
const quickAddModal = this.closest('quick-add-modal');
if (quickAddModal) {
document.body.addEventListener('modalClosed', () => {
setTimeout(() => { this.cart.renderContents(response) });
}, { once: true });
quickAddModal.hide(true);
} else {
this.cart.renderContents(response);
}
})
.catch((e) => {
console.error(e);
})
.finally(() => {
this.submitButton.classList.remove('loading');
if (this.cart && this.cart.classList.contains('is-empty')) this.cart.classList.remove('is-empty');
if (!this.error) this.submitButton.removeAttribute('aria-disabled');
this.querySelector('.loading-overlay__spinner').classList.add('hidden');
});
}

handleErrorMessage(errorMessage = false) {
this.errorMessageWrapper = this.errorMessageWrapper || this.querySelector('.product-form__error-message-wrapper');
if (!this.errorMessageWrapper) return;
this.errorMessage = this.errorMessage || this.errorMessageWrapper.querySelector('.product-form__error-message');

this.errorMessageWrapper.toggleAttribute('hidden', !errorMessage);

if (errorMessage) {
this.errorMessage.textContent = errorMessage;
}
}
});
}

[zurrax]

had same issue , I was using Groca theme 

Go to theme settings> then Cart > Change Cart Type from page to Drawer and then save
error will go away.