Sound is not properly output from the master out terminals or headphones.

Are you starting up the DDJ-WeGO2 and Virtual DJ LE in the wrong order? After connecting the DDJ-WeGO2, be sure to first turn on the DDJ-WeGO2’s power and wait for the startup illumination to finish, check that the unit’s [CTRL A], [FX1], [FX2], [FX3] and [CTRL B] buttons are all lit dimly, then launch Virtual DJ LE.