1. file is damaged or incompatible: the mod file is damaged or incompatible with the game version. You can download or update the file again.
2. Incorrect installation location: mod should be installed in the correct folder of the game, and it cannot be loaded due to incorrect installation. You can check whether the installation path of mod is correct.
3. Game version mismatch: mod does not match the current game version. You can try to update the game version or download the corresponding version of mod.