I confirm that any iOS 18 Simualtor that is used for Preview will crash with no reason. If I run the app normally in the Simulator, it works just fine. My solution was to go to Window -> Devices and Simulators -> click + -> add an iOS 17.5 device. Then in the preview window, select that device. Shameful problem

Found the working solution. Firstly, despite what everyone says here, debit cards are accepted. Also, if you get declined 3 times, you will have to wait 24 hours until you can try again, even if there is no message indicating that. (Apple messed up really bad here by not providing error details) But, there is a better way of doing it, instead of just waiting. In your dashboard (https://app.searchads.apple.com/), click your name on the top right corner. Then, click your name again (DON'T click Settings next to your Account Id). Your name should be highlighted in blue. You should see a page that has some categories: Apple Id, Email Preferences etc. At the bottom, you will see My Accounts. Click the button Create Account. From there you can restart the whole flow and you can enter your Debit card from the first try So, whenever you know you have wasted 3 attempts validating your card, you can just create a new account and skip the waiting. Note: The Create Account button might redirect you to an empty page. After 10-15 minutes it worked again. Hope this helps