this one works, I tested it

service/fsmanager.lua

@@ -18,7 +18,7 @@ function fsmanager.start()
  run = true
  return os.spawn(function()
   for addr, _ in component.list("filesystem") do
-   mount(addr)
+   fsmanager.mount(addr)
   end
   while run do
    local tE = {coroutine.yield()}