[SOLVED] Relock Bootloader Error

[Limosine]

Hi Guys,
I want to relock my bootloader, but when I type fastboot it says "Check 'Allow OEM Unlock' in Android Settings > Developer Options". But in the developer Options i can't select "Allow OEM Unlock" because the bootloader is already unlocked.
Now my question: How to enable "Allow OEM Unlock" with bootloader unlocked?
Thanks in advance

 

[Limosine]

SOLVED

I reinstalled the OS several times and now the option is available.

 

[przvlj]

I reinstalled the OS several times and now the option is available.

I had the same problem
I get toggle the oem unlock by flashing stock oreo, then signing into my google account and installing magisk
The day after, the option was already available.