README.md mentions server but it should be session

[GregorDeCillia]

I am not sure if this repo is still alive but the README mentions that

 ns <- server$ns

can be used to obtain the namespace of the current module. Surely you meant to write

ns <- session$ns

Also, you are misusing conditionalPanel. If used inside a module, you should use the ns argument as in

ns <- NS(id)

conditionalPanel(
   "input.myInput != 0",
   tagList(...),
   ns = ns
)

to make sure the module knows which namespace to use when looking up input.myInput.