Game is not working only when exported to HTML5

my game is not working when exported for HTML5

i am getting this error, but I can play without any interruption in the Construct 3 preview..

It shows plain black screen only, no sounds nothing..

Please help me fix this issue

Looks like how the problem, I don’t have anything to a direct solution for you but I can try to explain the problems a bit more.

CORS (Cross-Origin Resource Sharing) is a browser security feature that restricts how resources on a web page can be requested from another domain. When you’re developing locally (e.g., http://127.0.0.1), browsers treat your local setup as a different origin than any external API or service you try to access. This results in a CORS policy error.

The particle System in your game is throwing a TypeError: Cannot read properties of null (reading 'GetWorldInfo') error, it means that the particle system is trying to access an object that hasn’t been properly initialized.

Make sure that everything the particles depend on is available or try recreating the particles