Try deactivating all plugins except WooCommerce and check if that fix the problem, then activate them one by one. Make sure to keep a backup before doing this.
Not collecting a billing address can cause issues with payment methods, especially credit card transactions. It’s worth testing how removing the billing address affects your payment success rate.
You can change your login URL back from the web hosting panel. You need to access your database for that. Alternatively, you can try renaming your plugin folder to see if that solves the issue.
A 403 Forbidden error typically indicates that the server understands the request but refuses to authorize it. do you have any security plugin installed?
