Rhinestone designs are made up of 100/1000's of circles, your program looks at each of those circles as individual objects and it exceeds the number of objects the program can process. In order to make the file work in your program the circles for each color of the design have to be grouped to make them (1) object and not individual objects. After this process is done I label the file with either "Cricut" or "Cricut-Brother" typed at the end of the file name. These are the only two files that will work in your program for rhinestone files purchased from me.
The downside to doing this is you will no longer be able to break apart or ungroup the individual circles in the design after the file is uploaded into your Design Space program. This issue is only with rhinestone files. Files designed for cutting vinyl the regular SVG file can be uploaded without any issues.