ViolinCello crashes the software

I am trying to compose a string quartet in c minor 4/4 time with 2 solo violins, one solo viola, and one solo violin cello. Whenever i try to add a note to the violincello line musescore crashes and loses what i was working on. when i put notes on other lines it does not have this problem and it plays the note normally. when notes are added to the violincello line it is completely silent