Avoid Javascript errors on load

Rule from javascript under compatibility category

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Unhandled Javascript on the page could cause unexpected behaviour from various clients visiting the sites on different devices.

// BAD:
throw new Error('This is a uncaught error');

Unhandled Javascript could indiciate something much worse such as a warning from services like Stripe or Braintree, and as such must always be addressed as quickly as possible.

How do I fix this ?

Check the provided errors that were found for the individual causes and fix the coding issue.

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