You try to boot Gen2 Hyper-V VM with Acronis Bootable Media
Media fails to boot with the following message:
The image's hash and certificate are not allowed (DB)
No UEFI-compatible file system was found.
Secure Boot is enabled on the VM. Secure Boot prevents boot from a Linux bootloader in the ISO file (the Linux bootloader neither signed nor certified by Microsoft).
This issue is not specific to Acronis Bootable Media.
Temporarily disable Secure Boot in Settings -> Security -> Enable Secure Boot.
Alternatively, the "Secure Boot" selection can be changed to "Microsoft UEFI Certificate Authority." This selection should work for the majority of Linux distributions according to Microsoft.