Deus Ex: Mankind Divided. Cannot purchase Icarus Landing augmentation
Without Koller installing the Neruoplasticity module, enabling experimental augmentations increases your overclock state. The only way to bring down the overclocking is to disable one of your regular augmentations. Disabling it prevents you from putting Praxis points into it, which leads to this state.
Once Koller is available to install the module, it should re-enable your Icarus Landing System, allowing you to put points into it.