I Need some help installing a bluetooth adapter

I bought this adapter

and I'm trying to use this guide to install it, but I'm running into trouble from the first step.

When I try DKMS install I get:

user@mycomputer:~$ sudo dkms install

[sudo] password for user:

Sign command: /usr/bin/kmodsign

Signing key: /var/lib/shim-signed/mok/MOK.priv

Public certificate (MOK): /var/lib/shim-signed/mok/MOK.der

Error! Arguments <module> and <module-version> are not specified.

Usage: add <module>/<module-version> or

add -m <module>/<module-version> or

add -m <module> -v <module-version>

I am very new at this so any help would be greatly appreciated