Paralells won't find Bootcamp partition

I have Mac using bootcamp partition, with Windows 10, that is working correctly and booting correctly.

I have installed a pro license parallels desktop after and I'm trying to follow the steps described here https://kb.parallels.com/112941 but parallels
is not able to find bootcamp partition.

In Disk Utility the bootcamp partition is greyed out.

What can we do here?

Thank you

 

I have encounter the same problem:

Error: PRL_ERR_INVALID_ARG (0x80000003)
Path: '/Users/kirbyzhou/Parallels/Boot Camp.pvm/UserskirbyzhouParallelsBoot Camp.pvmBoot Camp-0.hdd.hdd'

My windows is on disk3s3

$ diskutil list disk3

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.2 TB disk3

1: EFI EFI 209.7 MB disk3s1

2: Apple_APFS Container disk5 829.0 GB disk3s2

3: Microsoft Basic Data WINDOWSEXT 270.1 GB disk3s3

4: Microsoft Basic Data Windows2Go 99.9 GB disk3s4

5: Microsoft Reserved 524.3 MB disk3s5​