• Make sure your site complies with the AdSense Program's policies. Keep in mind that we may examine all of your site's pages, not just the sign-up URL where the code was inserted. Sign in to AdSense after you've made the necessary changes to your content and ensure that the issues on your site have been rectified. After that, you 'll activate your AdSense account.
• According to AdSense restrictions, each publisher can only have one account. If you receive an AdSense email stating that your account cannot be activated due to a duplicate account, you must deactivate the other account, sign in to AdSense, and confirm that it has been closed. After that, you'll activate your AdSense account.

Read More: How can I resolve the problem by AdSense that your site is unreachable?