Welcome to the community!
that soundt like the 'not standard english charachter set' problem
https://sourceforge.net/apps/phpbb/lmms ... chter#p905
If you in any of your paths in the Settings dialog, has used charachters that are not in the normal standard english language, that will happen.
Im danish, and i have to avoid using æ ø å in my foldernames in the lmms tree.
If this wasent the problem, let me hear from you again
Br.