What does “Liquid error: undefined method” mean and can you fix it?

Yes, we fix it. Liquid error: undefined method means a snippet is calling a property or object that no longer exists, commonly after a theme update, a removed metafield, or a renamed variable. We trace the exact {{ }} or {% render %} that throws, restore the missing data source (or guard it with a sensible default like {{ value | default: '' }}), and confirm the page renders cleanly across templates.