Boot camp partition error

Hi,

I am trying to install boot camp (BC) and Windows 10, but I continue to get the same error. It starts, downloads the support software, has the iso file on the desktop, latest one Win10_1809Oct_English_x64.iso.

I get a popup for boot camp to add a helper, type in my password, and at the same time, the boot camp assistant shows the following error "Boot Camp installation failed. An error occurred while copying the Windows installation files." It then says to please wait while BC assistant is removing the partitions it created. I close it and try again, but the partition has to be manually removed. I have only one partition on the SSD which Mac OS is on.

Have tried what I have found on the community, but nothing stops this same error every time. I do not have time machine active. Have turned off FileVault. But I can not get past the error.

My system:

iMac Pro (2107)

1 TB SSD, am trying to partition 100gb for windows. Which leaves me about 200gb free on the SSD.

Mojave 10.14.1

Please help me figure this out.

Thanks.