The error "RPG Maker failed to load actor data" typically occurs due to one of the following reasons:
Corrupted Project Files: The project files containing actor data could be corrupted or have become unreadable.
Missing Files: The actor data file has been deleted or misplaced from its directory.
Improper Plugin Use: A plugin that modifies actor data is not functioning correctly or is incompatible with the current version of RPG Maker.
File Naming Issues: If files were renamed outside of RPG Maker, it may no longer recognize them.
Editing Software Conflicts: External software used to edit database files might have saved the files in a format that RPG Maker cannot read.
Solution - Here's How To Resolve It
To resolve this issue, consider the following solutions corresponding to the potential causes above:
Restore Corrupted Files: Check if you have backups of your project and restore the actor data files. Always keep regular backups to prevent data loss.
Recover Missing Files: Search for the actor data files in the recycle bin or use file recovery software. If you use source control, revert to a previous commit where actor data was present.
Review Plugins: Disable all plugins and then re-enable them one by one to identify the culprit. Ensure that all plugins are up-to-date and compatible with your RPG Maker version.
Correct File Naming: Make sure that all files are named correctly. RPG Maker has specific naming conventions, so ensure that they match what the system expects.
Edit With Care: If using external editing tools, save a backup before making changes and ensure to save in a compatible format. Prefer editing within RPG Maker itself to avoid compatibility issues.
If none of these solutions work, consider reaching out to the RPG Maker community forums for more personalized support or checking the documentation for specific troubleshooting related to actor data files.