With MCA installed (currently 7.2.0-beta.25-forge) my world with fail to start, and sends me back to the main menu. There's no crash report but the error is visible in the latest.log. Upon removing mca the game functions again.
latest.log

Does this also happen if you only install mca?

I have the same problem but in 1.16.5

Closed due to this being an older MCA beta, when 7.2.0 wasn't in as stable of a condition.

If this issue still persists in 7.2.0, on a world that didn't use this specific beta, please re-open with a new crash log with just MCA (And related dependencies, if any).