Undefined index path for installations in root directory

[layoutd]

Describe the bug:

The method API\Base::trigger_verification() has support for verifying site ownership for WordPress/WooCommerce installs in sub-directories (e.g., /store/), but shows a PHP notice for installs in the root directory:

PHP Notice: Undefined index: path in /…/plugins/pinterest-for-woocommerce/src/API/Base.php on line 380

This is because wp_parse_url() doesn't add any path index in this situation, which leads to an undefined index notice.

Steps to reproduce:

1. Install WP, WC and Pinterest in at the root of a domain accessible to the Pinterest verification (e.g., https://025c-88-3-151-32.ngrok-free.app)
2. Enable WP error logging.
3. Go through the connection Pinterest onboarding process and confirm that the notice is logged during site verification.

Expected behavior:

No notice.

Actual behavior:

PHP Notice

Additional details:

PHP 7.4, WP 6.2, WC 7.8, Pinterest 1.3.2