Apparently a normal save must exist for some reason, calling for a character to be made doesn't cause the signature to be created, and I don't know how to force create the signature (It's kinda driving me nuts)

apps/openmw/mwinput/inputmanagerimp.cpp

@@ -659,7 +659,7 @@ namespace MWInput
     void InputManager::quickSave() {
         if(MWBase::Environment::get().getWorld()->getGlobalInt ("chargenstate")==-1) { //ensure you're not in character creation
             const MWState::Slot* slot = NULL;
-            MWState::Character* mCurrentCharacter = MWBase::Environment::get().getStateManager()->getCurrentCharacter(true); //Get current character
+            MWState::Character* mCurrentCharacter = MWBase::Environment::get().getStateManager()->getCurrentCharacter(false); //Get current character
             if (mCurrentCharacter) //Ensure one exists
             {
                 //Find quicksave slot