What should I do if Error 17 persists even after validating my JSON files and checking logs?

If Error 17 persists, consider temporarily disabling all data packs, resource packs, and mods to see if the base game runs without the error. If it does, reintroduce your content one by one to isolate the problematic pack or mod. Ensure your Minecraft client and Java Runtime Environment (JRE) are fully updated. As a final resort, after backing up your worlds, consider a clean reinstallation of Minecraft, as corrupted core game files can sometimes cause unexpected parsing errors.