I am so sorry, i though you wanted to know if i can attach the files to the issue directly in mantis without the cropper. Thats why i said i can attach all the file types in mantis, but not via Cropper. The image i was trying to add via cropper is a .jpg file.
Yes, it is a screen shot program. And after taking the screen shot, there is an option to upload to mantis. When i click it, i get that error message See the image below.
Let me know if you need any more information.
Thanks,
Mamatha