Bootcamp Error: "Your Disk Could not be partitioned." Windows 10 installation

Hi,

I'm having trouble installing WIN10 by bootcamp on my MacBook Pro.

I get the error: Your Disk Could not be partitioned.

I have tried everything I found on the web to solve this problem but still no success.

This is what I have tried (and did not help)

• Using Windows 10 April version
• Disabled Time Machine
• Deleted Local Snapshots
• Disabled FileVault
• Disk Utility First Aid (also in boot mode)
• Reboot cmd + S and with /sbin/fsck -fy (disk check)
• Formatted Harddrive
• Reinstalled Mac OS and used migration assistent and Time Machine
• Reinstalled Mac OS Clean version no backup
• makt other partition with disk utility (error!)

This are all options I could find.

Maybe someone knows some other that could do the job?

Many thanks in advance.

I have a MacBook Pro Retina Mid 2012 Running Mojave 10.14.3 (18D109)