Can't upload entrylist, bop.json v1.3.1

As in title cant upload .JSON on my server. it let me choose, but when i selected and confirm my choose, the file is not visible in form field.

Edit. So i found ood thing. Upload doesn’t work with more than two entries….


Could you provide an example of an Entry List file that fails to upload? With that we can attempt to recreate the issue and suggest how to solve it.