The type of errors in your screenshot are referenced at the end of step 7 of the post #797 troubleshooting guide. Specifically, "Some of the 1_download_assets files with errors are NPC sprites that aren't used for harem scenes, downloading them directly from the game might be the only way to obtain them. Check post #688 (https://harem-battle.club/kamihime-p...tml#post158731) for more details." I've attached an updated guide that mentions the post #811 solution to the naming problem with the [Type Δ] Astraea, [Type β] Nymph, and [Type Ζ] Hiyori Kazane.
Edit 1: Updated to include both of the DLpy scripts and the DMM files for Paracelsus [Experimental Cat] and [Memorial0015] Koneko Toujou. I've also updated the DMM portion of the troubleshooting guide to explain how to avoid 1_download_assets stopping because of the incompatible images of the Anti-Minded Kamihime Angra Mainyu [Pure Evil] and Frey [Anti-Mind]. Post #809 mentions this issue and has a screenshot of the error. I remove the raw_scenario folders for these characters before running 1_download_assets, 2_build_rpy, and 3_write_config and put them back afterwards. The previous DMM files are on post #803.
Edit 2: Updated the troubleshooting guide to include the post #820 solution to the Anti-Minded Kamihime files not processing.
The newest Nutaku script files are on post #798. Jeanne d'Arc's files are on post #777. Post #762 explains what problems to look for regarding files downloaded by the DLpy scripts. 'InsecureRequestWarning' messages don't indicate a defective JSON file, you have to check the contents of the file for errors.