In Mu online Season 16 new sound related error appears, after running main.exe some of players gets error fmodex.dll
Themida error: Cannot find 'fmodex.dll', Please, reinstall the application.
Solutions to fix it:
Go to windows start menu and look for User Account Control settings
Change notification bar to Never Notify
Press Ok
You can run the game now
Solution Number 2 is install your windows update: October 20, 2020-KB4581000 Cumulative Update Preview for .NET Framework 3.5, 4.7.2 and 4.8 for Windows 10, version 1809 and Windows Server, version 2019 HERE