Hi! From my experience, a .crdownload usually means the download wasn't completed - Try downloading it again and checking your network connection during it too! Let me know if you still have problems after!
Tysm!! I'll try downloading it again & I'll check if my wifi's stable!!!
Update: IT WORKS TYSM I think that maybe my wifi was really bad that day lmao SORRY FOR BOTHERING YOUdsfkhsdjlfh