You need to install my versions of QModManager and SMLHelper for the mod to work because the versions from NexusMods have not been updated for the latest version of Subnautica yet. You can find the links on the Cyclops Docking Mod description page.
Updated the QMods link so now it should work with the latest BepInEx version for everyone (at least I hope so!). Please follow the steps in the "Posts" tab of the mod page.