Could not deduce (Storable a0) arising from a use of ‘sizeOf’
  from the context: Storable a
    bound by the type signature for:
               readMem :: forall a.
                          Storable a =>
                          Word32 -> ReaderT (PHANDLE, ForeignAddress) IO a
    at C:\Users\jakow\Documents\Programming\cshs\src\GameAPI.hs:21:1-73
  The type variable ‘a0’ is ambiguous
  These potential instances exist:
    instance Storable Word32 -- Defined in ‘Foreign.Storable’
    instance Storable () -- Defined in ‘Foreign.Storable’
    instance Storable Bool -- Defined in ‘Foreign.Storable’
    ...plus five others
    ...plus 82 instances involving out-of-scope types
    (use -fprint-potential-instances to see them all)
• In the second argument of ‘($)’, namely ‘sizeOf (t :: a)’
  In the second argument of ‘($)’, namely
    ‘readProcessMemory pHandle address $ sizeOf (t :: a)’
  In a stmt of a 'do' block:
    ptr <- liftIO $ readProcessMemory pHandle address $ sizeOf (t :: a)