Yesterday, I signed in to my Apple ID in Chrome on my MacBook and added a new email address to my account, and changed my country setting from the USA to Nepal.

After that, I tried to sign in to Apple Developer with my Apple ID. But since then, I have been getting a blank screen every time I try to sign in.

I have tried many ways to sign in again, and each time I get a blank screen. I tried to sign in again by deleting the cookies and history, signing in incognito, from Safari and from Chrome on iPhone. I keep getting the blank screen. I see that I am still signed in to my account in the settings on my MacBook and iPhone, but I am not able to sign in on the Web. I have also tried to sign in after upgrading to the latest iOS on both my phone and Mac, but I am still not able to sign in.

How do I solve it?

Edit: solved:

Tried to sign in to the Web iCloud on the same Mac the other day and was able to sign in. Then I was able to sign in to all other places as well. For the Apple Developer account, I turned on two-factor authentication for the country where I had changed the location, and I was able to enroll.

I recently forgot my Iphone password and because of that had to restet it. When i tried to log in to my apple-id on my phone i told me my apple account had been deactivated and i would have to reactivate it by going to apples website. When i tried to activate it thrught thier website (on my mac) it told me that i could ethier get an email to my icloud and proceed from thier or answer some safety quiestions to activate it. I first tried the email option because it sounded easier, but didn´t recive the email. After trying some more times to get the email i tried to answer the questions, but couldnt even get the first one right (what date i was born, which i of corse know). Now i dont know what to do and was wondering if anybody else have had the same problem?

(Sorry for my terible english)