SJC keeps crashing

Hi,
A friend and I are trying to install soundjack on our computers. On my end it seemed to work after multiple log out logins ( I kept having the message, make sure you downloaded the latest version of SJC). Finally it seemed to work but now I consistently have the message that says that it’s crashing. On my friends end he also has the same issue but for him he is still in that phase where he’s having that message: make sure you are installing the latest version…. We both did (latest on the webpage is November 2021 I believe) Now our operating systems are the following. Catalina 10.15.7 and me I have Big Sur 11.4. Is there anything we need to do in order for soundjack to run smoothly ? Thanks a lot for your help!