This usually means one of the parts is corrupted or missing. Try redownloading the specific part mentioned in the error.
Multi-part RAR files work like a puzzle. To extract the game, you must have (e.g., part1.rar , part2.rar , etc.) downloaded and saved in the same folder on your computer. If you are missing even one part, the extraction will fail. 2. How to Extract You only need to interact with the first file: paradise_lust_win64_0.20.0a.part2.rar
Look for paradise_lust_win64_0.20.0a.part1.rar . This usually means one of the parts is corrupted or missing