錯誤 / Error!

error:

Helmet expects a string as a child of <title>. Did you forget to wrap your children in braces? ( <title>{``}</title> ) Refer to our API for more information.

Invariant Violation: Helmet expects a string as a child of <title>. Did you forget to wrap your children in braces? ( <title>{``}</title> ) Refer to our API for more information. at Yft (https://yoalearning.com/assets/index.521ca859.js:248:4703) at $3.warnOnInvalidChildren (https://yoalearning.com/assets/index.521ca859.js:248:15959) at https://yoalearning.com/assets/index.521ca859.js:248:16450 at https://yoalearning.com/assets/index.521ca859.js:9:3799 at https://yoalearning.com/assets/index.521ca859.js:9:3287 at t1 (https://yoalearning.com/assets/index.521ca859.js:9:2496) at t1 (https://yoalearning.com/assets/index.521ca859.js:9:2803) at f0 (https://yoalearning.com/assets/index.521ca859.js:9:3253) at Object.forEach (https://yoalearning.com/assets/index.521ca859.js:9:3781) at $3.mapChildrenToProps (https://yoalearning.com/assets/index.521ca859.js:248:16265) at $3.render (https://yoalearning.com/assets/index.521ca859.js:248:16835) at _8 (https://yoalearning.com/assets/index.521ca859.js:32:6220) at wF (https://yoalearning.com/assets/index.521ca859.js:32:6016) at fZ (https://yoalearning.com/assets/index.521ca859.js:32:45335) at lZ (https://yoalearning.com/assets/index.521ca859.js:32:40098) at d2e (https://yoalearning.com/assets/index.521ca859.js:32:40024) at qw (https://yoalearning.com/assets/index.521ca859.js:32:39875) at N8 (https://yoalearning.com/assets/index.521ca859.js:32:36205) at oZ (https://yoalearning.com/assets/index.521ca859.js:32:35149) at _ (https://yoalearning.com/assets/index.521ca859.js:17:1550) at MessagePort.I (https://yoalearning.com/assets/index.521ca859.js:17:1914)