upload crashes

I try to upload 590 images of 7 MB each of this manuscript and it stalls. I reduced charge to ca. 40 images and it still stalls in the middle of image 1. I reduced further to 7 images and it still stalls. As it is with a iiif link a direct iiif upload would be perfect. It is the testcase of tikkoun sofrim. We have the full data of the machine transcription and I now created also new GT from the user transcriptions (UT) that looks excellent and we could use eScriptorium to quickly fix remaining issues for 200 pages.