failed to preview on construct 3 with c2 file

I am opening C2 file on C3.

I have erased all the event sheets, plugins, and layers, but it still does not open unless almost all sprites are removed.

please help me. it's so frustrating.

Have you tried saving the project in C3 and re-opening it?

The issue may be with just one sprite or behavior or effect. Try finding which one.

Also try a different browser, maybe you'll get a different error message in console.

yes I have opened it after saving it in C3.

Ok. I will try it in other browser.

But I think it took forever to find where the problem is. I should erase almost every sprites no matter what(it seems no connection with each other)