Received this error message when starting up server.

Details:
Mod File: WAWLA-1.16.4-7.0.1.jar
Failure message: Mod wawla requires minecraft 1.16.3
Currently, minecraft is 1.16.4
Mod Version: 7.0.1
Mod Issue URL: https://github.com/Darkhax-Minecraft/Wawla/issues
Exception message: MISSING EXCEPTION MESSAGE

but on the website, it said it was version 1.16.4.

No, it isn't

Thank you for reporting. This issue should be fixed now.