Build 10278727 may no longer be compatible with current official multiplayer servers.
If you own the game on Steam, you can download specific historical builds using the Steam Console. The "Build ID" 10278727 corresponds to a specific manifest file in the Steam database. Download Stars End Build 10278727
If you can tell me you need this specific build (e.g., a specific bug, a mod requirement, or a private server), I can help you find the safest way to access it. Build 10278727 may no longer be compatible with