To help you with the error message while importing animation into Unity, here are a few steps you can follow based on common issues and solutions:
Check Spine-Unity Runtime Version: Ensure that the spine-unity runtime version matches your Spine editor version. For Spine 4.2, you should use the spine-unity runtime 4.2. You can find the version in Assets/Spine/version.txt or in the Unity Package Manager if installed this way. If it's outdated, download the latest version from spine-unity download page.
Export Settings: Verify that you have exported all necessary files from Spine, including the .json or .skel file, the .atlas.txt file, and the corresponding texture files. Ensure they are all placed in the same folder in your Unity project.
Import Settings: Make sure your import settings in Unity match the export settings from Spine. This includes checking the texture import settings and ensuring that the materials are correctly set for the atlas asset.
Compatibility: Ensure that the Unity version you are using is compatible with the spine-unity runtime version. Sometimes, using very new or very old versions of Unity can cause compatibility issues.
Error Details: If the error persists, please provide more details about the error message. This can include the exact text of the error, any warnings during export, and the specific steps you followed during the import process.
Here is a useful link for troubleshooting common import issues: Import Troubleshooting - spine-unity tutorial.
If these steps do not resolve your issue, please provide more details or share the problematic assets so that we can investigate further.
