Unity WebGL Error

It gives this error and yes, I ticked the Decompression Fallback option, but it does not work. I will publish the game in yandex games, can anyone tell me a solution accordingly?

This suggests that Yandex has not set up their web hosting properly for Unity games, or maybe there is a configuration that you need to enable on their backend.

If they support Unity content, and you have followed their instructions on uploading, try contacting them to see if they would have a recommendation. Check out this thread https://discussions.unity.com/t/839192 for more discussion on the topic.