Reality Composer Pro is freezing/not working

Hi all! I am struggling to make any app because reality composer pro freezes when I click on create new project, as well as it does not appear in Xcode at all. I have tried deleting and redownloading all versions of both Reality Composer Pro & Xcode, as well as restarting my computer. Kindly advise what else I can try. Thank you!

Reality Composer Pro is freezing/not working
 
 
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