Heyo,
After successfully packaging my game for HTML5, I get the error
Failed to open descriptor file '…/…/…/X/X.uproject
I am using Firefox Developer Edition 40.0a2 (2015-05-26)
What am I missing ?
Still Noone? 
This is the rest of the error message…
Error: uncaught exception: abort() at jsStackTrace@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:1:18192
stackTrace@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:1:18375
abort@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:174:78449
ZFR@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:165:769509
O0b@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:33:103474
vq@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:77:37320
Qq@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:77:46726
Rq@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:77:47027
callMain@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:174:76754
doRun@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:174:77583
run/<@file:///Z:/ZDF%20SPORTStudio/UE4%20Builds/HTML5/UE4Game-HTML5-Shipping.js:174:77751
Hey Invisible ,
Have you attempted to package your HTML5 project and launch it onto any other web browser, such as ? Also, which version of emscripten are you using?
Looking forward to hearing back from you, thanks.
Thanks for the reply:)) I have tried launching it in Firefox, , Firefox Dev and Chrome. I am using emscripten 1.30.0 and python 2.7.5.3_64bit
Hey ,
I would suggest downgrading your emscripten. There is currently an issue with 1.30.0 and it’s not fixed yet, and isn’t expected to be corrected until 4.9. I know that 1.25.0 and 1.29.0 works. Please try that and let me know how it goes, thank you. 
Thanks^^ I deinstalled 1.30, installed 1.29 , but the error remains. Why would it even try to open the UProject file, its not part of the build…
edit: Just created a new project (FP BP with starter contend) and build it. It worked. Seems to be a project-specific problem…
edit2: or not. any build after the first failed to start in the browser. tried to create a new project (FP BP with starter contend) again and this time I couldnt start it. at least this time its a new error message:
Error: uncaught exception: abort() at jsStackTrace@file:///Z:/_TEMP/HTML5/UE4Game.js:853:12
stackTrace@file:///Z:/_TEMP/HTML5/UE4Game.js:867:21
abort@file:///Z:/_TEMP/HTML5/UE4Game.js:5112771:24
b79@file:///Z:/_TEMP/HTML5/UE4Game.js:5090450:2
__ZN13FOutputDevice4LogfEPKwz [FOutputDevice::Logf(wchar_t*, …)]@file:///Z:/_TEMP/HTML5/UE4Game.js:3255148:2
__ZN6FDebug12AssertFailedEPKcS1_iPKwz [FDebug::AssertFailed?S(char*)]@file:///Z:/_TEMP/HTML5/UE4Game.js:1816589:2
__ZN24FICUInternationalization10InitializeEv [FICUInternationalization::Initialize()]@file:///Z:/_TEMP/HTML5/UE4Game.js:990222:3
__ZN21FInternationalization10InitializeEv [FInternationalization::Initialize()]@file:///Z:/_TEMP/HTML5/UE4Game.js:4564468:20
__ZN21FInternationalization3GetEv [FInternationalization::Get()]@file:///Z:/TEMP/HTML5/UE4Game.js:4231991:2
__ZN5FText14FormatInternalERKS_RK6TArrayI20FFormatArgumentValue17FDefaultAllocatorEbb [FText::FormatInternal?(undefined?S?&)]@file:///Z:/_TEMP/HTML5/UE4Game.js:985615:14
… and so on.
No Idea whats going on here x)
Hey ,
I’m waiting to hear back from our HTML5 developers regarding the errors that you’re receiving. I will let you know as soon as I hear from them.
Thank you for your patience.
Hey ,
In order to further assist you, we’re going to need your packaged project. Please upload it and provide a link to us either here, or through a private message on the forums.
Thank you!
Alright, thank you. PM is on the way.
Cant really find a PM function when I click on your name, but doesnt matter. Here is the link:
https://www…com/s/qfu8kndi1rw8000/HTML5.zip?dl=0
Hey ,
I have submitted a bug report to our developers. You can reference this bug by referring to: UE-17140
I will update you as soon as I hear back from our developers regarding the bug updates. If you have any further questions, please let us know.
Have a great day!
Could you go into your project’s Saved/StagedBuilds/HTML5 directory and zip up the contents? The full packaged one is harder to decompose.
Also, I get a different error (it finds the .uproject but then no ICU data files - similar but different).
I dont get the descriptor file error anymore either (after I made a new project with just the necessary assets).
So its probably the same error for both of us now)) Here is the new link: https://www…com/s/za36y3fno7rz9bm/StagedBuilds.zip?dl=0
Hey ,
Thanks for providing us with that information. I have made sure the report was updated with your link. Please do not take this down at this time.
We will reply back once it’s fixed or if we need more information.
Well I don’t see anything wrong at first glance. We’ll poke more at it!
Old post, but I’m still running into this exact issue, and I noticed the issue is marked as “Won’t Fix”. Does this mean there’s no ideas on how to solve it?