My regular Nutaku player's 1_error.log is 452 KB so you appear to have an issue I haven't run into. I'm currently doing a clean install of the Nutaku player using the method I explained above. 1_download_assets will likely take several hours even with the uncensored JPGs pasted in advance. A lot of the errors are of character sprites in the encounter episodes, the episodes that take place before the harem scenes. If you need a VPN or proxy to play the game, you likely need one to complete 0_download_json and 1_download_assets. I doubt this is a problem in your case as you said that 0_download_json works. Make sure that there isn't a Windows 10/11 security permissions conflict when using the scripts like with other programs. Also, run 1_download_assets multiple times before 2_build_rpy, especially for a clean install or if you have a slow/unreliable internet connection. When testing the player, I run all of the scripts, open the player, and view a few of the newest scenes. I only look through the error logs if one of the scripts gives an error that stops it immediately such as post #614 or the player doesn't load or crashes like post #581.