at Sandbox.Definitions.MyDefinitionManager.LoadDefinitions(List`1 contexts, List`1 definitionSets, Boolean failOnDebug, Boolean isPreload)
MOD_CRITICAL_ERROR: Midspace's Small Ship Speed Unlimited mod, in file:
MOD PARTIALLY SKIPPED, LOADED ONLY 6/6 PHASES, Following Error occured:
Object reference not set to an instance of an object.

Ok thanks, it works now :)

Most subscribed mods need to be added to your individual game world.
In game, at the main menu, select a world, and click edit. Then select mods.
You should then have a list of subsribed mods on the left.
Double click them individually to add them to the mods in the world.

I have subscribed to this, but it changes nothing. Any ideas why?