UE4.27 HTML5 stuck on "Launching engine.."

So basically I followed a bunch of tutorials on how to get the GItHub HTML5 repository working with UE4.27. All good even with the packaging of the game in html. The problem is that when I try to run my game locally it gets stuck on “Launching engine…” forever.
Do you have any clue or fix for that? (My game is 2D 1Bit style so very light, I have like 150MB of sounds and thats it).
Heres the screen I get on web: Screenshot - 7d3333baa725b5fc5000543db58c3329 - Gyazo

This worked for me:

UE4.23 HTML5 build stuck at “Launching Engine…” - Development / Platform & Builds - Epic Developer Community Forums (unrealengine.com)