That error usually means MelonLoader failed to hook into the game correctly.
This is commonly caused by one of the following:
- Using an incompatible MelonLoader version
- Game version mismatch
- Missing or corrupted MelonLoader files
- Antivirus blocking MelonLoader
Things you can try:
- Make sure you are using a compatible version of MelonLoader (for 0.95.16, versions like 0.7.2 or certain 0.7.3 nightly builds are known to work)
- Reinstall MelonLoader cleanly
- Launch the game once after installing to generate files
- Temporarily disable antivirus or add an exception
- Make sure you are installing it to the correct game directory
If the issue persists, feel free to share more details about your setup.