You appear to have the same issue as Serveur Time out Sponge Forge 1.12.2-2555-7.0.0-BETA-2774 Maybe you can see what is in common between you.
Also,
Version: sponge 1.10.2 lastest
forge 1.10.2 lastest
Isn’t too useful. By the time people read your forum request, several versions of Sponge and or Forge could have been released.
Full logs (or at the least, log headings, and full crash / error) would have told us the version you are using as well.