Can no longer install ventoy

[iomari]

Greetings,
I suddenly can't install ventoy anymore.
I'm getting the error:
./tool/ventoy_lib.sh: line 63: ./tool/x86_64/mkexfatfs: Permission denied.

I've tried using sudo and as root but I get the same error.
I don't know if my recent upgrade from Kubuntu 21.04 to 21.10 has any thing todo with it but I doubt it.
I've tried different flash drives but I still get the error.
Any ideas anyone?

thanks in advance
iomari