No crash report is given.

traverse-3.0.0+build.6
terrestria-2.1.4+build.26
fabric-api-0.24.3+build.414-1.16

No other mods are present.

Logs file if you need it:
latest.log

Please update Terrestria to version 2.1.4, you have 2.1.2.

The incompatibility with 2.1.3 or later should probably be noted in the mod json file, but it's a bit too late for that now. This is caused by moving code internally from Terrestria to a common library mod.

Tried 2.1.4. Same crash.

New logs file if needed.
latest.log

Cinderscapes also needs to be updated to 1.2.3 as well.

Ah.

Yep, that fixed it.

Fabric reeeeeeaaaaally loves not giving crash reports...

It seems like crashes early in Minecraft startup don't result in a report, which kinda sucks. Maybe Fabric can fix this.

Yep. You could try letting them know about it possibly.

You also need to update Fabric API...