Failed to create child account for google ad manager

whenever click on “Sign up for a Google Ad Manager account” as shown in the picture bellow, nothing happens. I have tried to reload and refresh pages, logged out and in again but nothing has changed, could you please help me with this error or if it can be manually done by Kodular help me.

Please search the forum instead of spamming it as your query has been addressed already.

NO one replies to me if I comment my issue on the previous posts, i needed someone to solely help me on this specific issue, I just need help