Please check if libavs-win64.dll exists and the permissions are fine.
If the problem still persists, try installing:
* Microsoft Visual C++ Redistributables (*all* versions, *both* x86/x64)
Hint: use one of the AIO installers (e.g. https://github.com/abbodi1406/vcredist)
* DirectX End-User Runtimes (June 2010)
* Running Windows 10 "N"?
Grab: https://www.microsoft.com/en-us/software-download/mediafeaturepack
Check: https://support.microsoft.com/en-us/help/4562569/media-feature-pack-for-windows-10-n-may-2020
* Running Windows 7 "N"?
Grab: https://www.microsoft.com/en-us/download/details.aspx?id=16546
* Still have problems?
Find the missing dependency using: http://www.dependencywalker.com/
[2021/06/05 15:28:51] F:launcher: avs boot failure
[2021/06/05 15:28:51] I:launcher: stopping subsystems
[2021/06/05 15:28:51] I:logger: stop
[2021/06/05 15:28:51] I:rawinput: disposing devices
how can i get ilbaves-win64