Open your mod manager's Load Order tab and ensure the HCG_-_Baijis_Dependencies.esp (or similar) is positioned high in the list, above the main HCG creature or quest mods.

You can install it directly via your mod manager by selecting "Install from File" or dragging the archive into the "Downloads" or "Mods" tab.

While "Baijis" specifically often refers to internal asset names or specific creature packs (like the "Baiji" dolphins or related mythical creatures), this .rar file is designed to provide the necessary shared assets (meshes, textures, and scripts) required for their other mods to function correctly.

Copy the extracted files (typically a .BA2 file and an .esp or .esl file) into your game's folder (e.g., Steam\steamapps\common\Fallout 4\Data ). Load Order Management