wow. this literally just happened to me too. the dropdown is now empty and it has always had mixamo/rokoko/xsens/perception, etc
Hi kushtrimthaqi85, Thank you for your feedback! Does this issue still occur ? If you can reproduce this issue, please update your iClone version and try it again. If issue still exist, please send your mixamo animation fbx to us, so that we can identify this issue properly. You can upload this file to cloud service such Google Drive, and attach the download link in your next comment. Thank you for your help! Calvin Reallusion