Quick answer: If reloading doesn't fix it, we'll need a screenshot of your browser's console log to track down the bug.
Chrome
Reload the page where you saw the error.
Open the developer console: Option + ⌘ + J (Mac) or Shift + Ctrl + J (Windows/Linux).
Click "Console."
Clear the console so it's empty.
Do the action that caused the error again.
Screenshot everything that appears in the log and send it to [email protected].
Firefox
Same steps as above, but open the console with Option + ⌘ + K (Mac) or Shift + Ctrl + K (Windows/Linux). Desktop only, this won't work on phones.
Safari
Same steps as above, but open the console with Option + ⌘ + C. Desktop only, this won't work on phones.
