Can not upgrade to Tiktok Professional

[forexuytin]

My tiktok account has reached 11k followers and I has changed my ip also my timezone to Germany and USA but I can not see button to change my account to professional account.
Can anyone help me ?
I just see switch to business account button. Thanks !

 

[Optimail Digital]

You can try switching to a business account first and then upgrade to professional account!

 

[forexuytin]

You can try switching to a business account first and then upgrade to professional account!

I've tried but I still can not see " Switch to Professional Account " button !