Minecraft: 1.16.5
Forge: 36.2.33
Ambient Sounds: AmbientSounds_v3.1.11_mc1.16.5.jar
BYG: byg-1.3.5.jar

In the Guiana Clearing Biome, I get a crash sometimes.
Here's the log.

Look at the full log.

I deleted the rest of the log. Only the crash should be visible now.

Normally the crash is at the end of the file, sorry must have overlooked it. I have seen this crash before and it normally does happen if AmbientSounds is installed on server side (which is not the case here). To be honest I got no idea what is going wrong. Maybe it's a conflict with another mod. You could try to install just CreativeCore and AmbientSounds and see if it works. Then add more and more mods till it crashes again. Also have to say that I have dropped support for 1.16.5. I'm very sorry for the situation, but I don't see a different way to help you at the moment.

Understood. It doesn't happen that often, but yeah. Might be a loading order issue or something. I'll look into it more at some point.

Ok. I will close this issue for now.

Please post the crash-report here. The log does not include any crash at all.