I don't understand what I should do to join the Apple Developer Program. I've already tried using the "Developer" mobile app, but the "Enroll now" button is not available. I've also tried using the website, but it showed an error message: "Your enrollment in the Apple Developer Program could not be completed at this time." I've contacted Apple support, and they replied: "...We can't continue with your enrollment at this time...". Sorry, but what did you say? I ask those who have already gone this way to give me some advice. What should I do? I am a regular developer who was about to publish my IOS app on the AppStore. I put a lot of effort and time into it and ended up with this obstacle...