By default, Testcafé will fail a test if the page it wants to test throws error in the console. You can ignore this by running your test suite with the skipJsErrors option on true, although a better solution would be of course to fix the JavaScript errors thrown in the console.
const testcafe = await createTestCafe()
const runner = testcafe.createRunner()
await runner
// ... Other runner configuration ...
.run({
skipJsErrors: true
})More information available at the TestCafé documentation