I can’t logout my iCloud account

Hello, sanni163.

Thank you for using Apple Support Communities.

This may be because you're using a hotspot for a connection. Have you tried using cellular data or another Wi-Fi network? This can help rule out any connection issues. You can also check out this article for information about signing out of iCloud: Sign out of iCloud on your iPhone, iPad, iPod touch, Apple TV, or Mac - Apple Support

1. "Go to Settings > [your name]. 
2. Scroll down to the bottom.
3. Tap Sign Out.
4. Enter your Apple ID password and tap Turn Off. Forgot your Apple ID password? 
5. Turn on the data that you want to keep a copy of on your device.
6. Tap Sign Out.
7. Tap Sign Out again to confirm that you want to sign out of iCloud."

Let us know if you have any further questions.

Cheers!