# Game will not build after 31.00

**URL:** <https://forums.unrealengine.com/t/game-will-not-build-after-31-00/1979252>\
**Category:** Issues and Bug Reporting\
**Tags:** fortnite-creative, unreal-editor-for-fortnite, fortnite\
**Created:** [August 16, 2024, 9:24pm UTC](https://forums.unrealengine.com/t/game-will-not-build-after-31-00/1979252 "2024-08-16T21:24:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MusicOasisOMNI](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/musicoasisomni/32/1094995_2.png) [@MusicOasisOMNI](https://forums.unrealengine.com/u/MusicOasisOMNI)\
**Post date:** [August 16, 2024, 9:24pm UTC](https://forums.unrealengine.com/t/game-will-not-build-after-31-00/1979252/1 "2024-08-16T21:24:38Z")

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### Please select what you are reporting on:

Creative

### What Type of Bug are you experiencing?

Other

### Summary

Game will not build but doesn’t report back error on the server side of things.  
[2024.08.16-16.18.37:652][795]LogValkyrie: ProjectSizeRequest::Cancel for 81c671be-409f-5ee8-f64a-55bd1cf469c7 - Content (re)cook error errors.com.epicgames.cookplugin.cookfailure.  
JOB\_ID=b227d0ca-8b94-4125-bc29-8d67d70c9c9e

Can a dev look at the server log and let me know why it isn’t launching?

### Steps to Reproduce

Whenever I try to launch session it fails with the cook error

### Expected Result

It should cook or at least give me a hint on what I need to change to get it to cook.

### Observed Result

I only get the error message but no further information because it probably is in the server log but doesn’t get pushed back down to my client log.

### Platform(s)

All

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<div class="post-metadata">

**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\
**Post date:** [August 16, 2024, 9:44pm UTC](https://forums.unrealengine.com/t/game-will-not-build-after-31-00/1979252/2 "2024-08-16T21:44:12Z")

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Hi,  
read the post  
[[LAUNCHING SESSION] - MAJOR Issue - General / Issues and Bug Reporting - Epic Developer Community Forums (unrealengine.com)](https://forums.unrealengine.com/t/launching-session-major-issue/1978593/17)  
Quote  
**Any of the Niagaras present in the project were adversely affected!  
After deleting all the Niagara in the project, the session loaded!**