Problem
Visual Office Conversion with many files (37) failes in the PDF to HTML step.
It runs into the max_file_uploads directive limiting to 20 files. (strangely enough, the container answered with HTTP status 200 instead of 201 making evaluating this error very hard) The easy solution would be to raise the limit, but the far better solution is to send a zip instead a bunch of files. Historically, only the pdf-to-html step does this (all other visual steps use ZIP alongside an inventory-file to exchange data) and unifying this would also increase the code simplicity & quality greatly and make the request faster.

Solution
Change pdf-to-html step to use ZIP instead of sending single files