The latest version of Answer still cannot upload JPG files

Got it. You mean it:

1. The upload failed, but the 0kb file should not be on the server
2. Why the picture taken with a mobile phone is not formatted correctly.

I will dig more.

thank you for your answer; If you check the upload folder on the server, you should be able to find the corresponding jpg file, but the size is 0 bytes;

Thank you very much.

Is there something wrong with the picture itself? You can go to github issu and upload the image to test it.