# Troubleshooting [Back to Gameplay programming](https://rustic-game-engine.pages.dev/markdown/guides/gameplay-programming.md). - **Editor executable missing:** install VS Code, select VS Code Insiders, configure a validated custom executable and native argument template, or use system association. - **Invalid script:** click its diagnostic to open the exact location. The last-known- good runtime instance continues during Play. - **Manifest mismatch/missing source:** restore or re-import the source, or move it through the editor so the asset registry updates automatically; duplicate IDs are quarantined instead of guessed. - **Reload rejected:** check API major, property types, source size, and syntax; use Restart Play after an intentionally incompatible change.