Some of our players have experienced server errors while building items during Galaxy Events.
Our engineers have been hard at work on this. The cause has been identified and a fix will go live in the near future.
In the meantime, to avoid encountering this issue Captains are advised to force close the game when not playing instead of leaving it open in the background. This should prevent the issue from occurring. Please note that, when this error occurs, the item is still built and available to use, but you may need to restart the game to see the updated recipe.
Thank you for your cooperation!
The Star Trek Timelines Team