[4.20/21]HMTL5 Packaging Stuck in "--no-heap-copy"/Launch works fine

We have a project in 4.21 that packages with a fair amount of time, but the other one that it is in 4.20, just stays stuck in this line:

UATHelper: Packaging (HTML5): Running: C:\Program Files\Epic Games\UE_4.20\Engine\Extras\ThirdPartyNotUE\emsdk\Win64\python\2.7.5.3_64bit\python.exe "C:\Program Files\Epic Games\UE_4.20\Engine\Extras\ThirdPartyNotUE\emsdk\emscripten\1.37.19\tools\file_packager.py" "C:\Users\Marco\Documents\Perforce\ESSANNI\Binaries\HTML5\ESSANNI.data" --preload . --js-output
="C:\Users\Marco\Documents\Perforce\ESSANNI\Binaries\HTML5\ESSANNI.data.js" --no-heap-copy

OLD->Is there anything that differ from one version to the other, about the project settings to be able to package?

The Project launches currectly in either 4.20 or 4.21, but stays stuck in that last log line that i have mention.
Now my question is, is there i can do to make the package work currectly?

268908-ue-4.png

I’m having this same problem