Recap API cannot convert photo to 3d model

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I'm using Recap API to convert some photos to 3d object (.obj) by following this demo of Autodesk:
https://github.com/Autodesk-Forge/photo-to-3d-sample
When I use photos of demo it was run normally. But when I use my photos it's alway return an empty zip file (filesize: 22bytes) an cannot extract it like an attach file below.
This is some photos of an example:
https://s3.amazonaws.com/adsk-recap-public/forge/lion/DSC_1158.JPG
https://s3.amazonaws.com/adsk-recap-public/forge/lion/DSC_1159.JPG
https://s3.amazonaws.com/adsk-recap-public/forge/lion/DSC_1160.JPG
https://s3.amazonaws.com/adsk-recap-public/forge/lion/DSC_1162.JPG
https://s3.amazonaws.com/adsk-recap-public/forge/lion/DSC_1163.JPG
https://s3.amazonaws.com/adsk-recap-public/forge/lion/DSC_1164.JPG
https://s3.amazonaws.com/adsk-recap-public/forge/lion/DSC_1165.JPG
And this is my photos:
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125628.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125621.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125616.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125609.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125602.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125556.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125550.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125539.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125533.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125529.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125522.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125515.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125504.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125455.jpg
https://s3.amazonaws.com/3dimagetest/dauca/20171222_125446.jpg
I use my iPhone SE to capture my photos and the photo of a demo was captured by DSLR NIKON 1 J1 but I don't think this is the main problem. Please help.