Musescore 2.3 systematically crashing when I add some percussion instruments

I don't know if this bug has already been reported… I downloaded the drumline extension that comes with Musescore 2.3 and each time I try to add 'percussion' (as an instrument) or tambourine from the instruments list the programme crashes and I have to restart it. What's worse is that I cannot add those instruments to the score. Any suggestions on how to fix this problem?