Please use the Support forum https://musescore.org/en/forum/6 to ask for help using MuseScore, not the issue tracker.
Which Operating System (Windows? Mac?)
When you go to View > Synthesizer, do you see a soundfont listed?
When you go to Preferences > I/O, what do you see ?
See: https://musescore.org/en/node/96811
Comments
Please use the Support forum https://musescore.org/en/forum/6 to ask for help using MuseScore, not the issue tracker.
Which Operating System (Windows? Mac?)
When you go to View > Synthesizer, do you see a soundfont listed?
When you go to Preferences > I/O, what do you see ?
See: https://musescore.org/en/node/96811