易家懿 Thank you for sending us the Spine project file.
I checked it out, but the project is so large that it might be causing the export to fail. I tried to export it myself, but the editor crashed halfway through.
For reference, Spineboy's Spine project file is approximately 60 KB. Yours was 7.7 MB, about 128 times larger. After cleaning up the animations, I reduced the size to 4.2 MB, so deleting unnecessary keys may help.
Then, without packing it, I tried exporting only the skeleton data file (.skel.bytes), and I was able to export it without any errors. Try lightening up your Spine project.
