Error Mounting EFI

I am on MacOS 10.14.6 and I have installed Windows 10 on the external SSD drive.
I was getting bless tool error and I have tried to do EFI bootable with Winclone 7.

I have disabled the SIP as well.

Please help.

Try mounting the EFI partition by running:

sudo diskutil mount disk0s1 and see if it gives an error.

Also, run:

diskutil list

and verify that EFI is on disk0s1.