https://lmms.io/wiki/index.php?title=Tested_VSTs
Also, see if this works:
Check the Lmms Settings menu.
https://lmms.io/wiki/index.php?title=LMMS_Settings
1) Go into the Lmms Settings menu and find the Audio Settings tab.
Change audio device to SDL.
https://lmms.io/wiki/index.php?title=Fi ... _1.1.0.PNG
Also:
2) In the same Lmms Settings menu, check to see if any weird symbols are in the folder paths.
eg. $ or % or # etc.
https://lmms.io/wiki/index.php?title=Fi ... _1.1.0.PNG
3) Press OK.
4) Close Lmms.
5) Restart Lmms, so that the changes will have effect.
Tell us what happens from there.