Did you update your hardware then from the Gigabyte 170X board then? You probably just have to format you M.2 drive to APFS or Mac OS Extended which will be converted to APFS later if you are installing Mojave later versions. See below from the site.
6. For a new installation of macOS, you MUST erase and format the destination drive according to the following steps before continuing.
a. In the top menu bar choose Utilities, and open Disk Utility
b. Highlight your target drive for the Mojave installation in left column.
c. Click Erase button
d. For Name: type Mojave (You can rename it later)
e. For Format: choose Mac OS Extended (Journaled)
f. Click Erase
g. Close Disk Utility
Clover options of classic or vibrant are unimportant, either will work. Replace the EFI folder. Ignore the FAT32 comments and just follow the steps.