ServerSelectionTimeoutError

르탄이 디폴트 값을 display: none 또는 visibility: hidden으로 바꾸고 싶습니다.

선생님이 하는데로 그대로 했는데 오류가 나네요	 <img alt="스파르타 즉문즉답" src="https://media-sparta.s3.ap-northeast-2.amazonaws.com/media/tempfiles/community/56cc04e0-a8b4-4011-9afb-60607d2fcbf6OTk1NjkxLjA1NTE2MTAzMDMxNjY2MDA2NjU2NDU4.png"><img alt="스파르타 즉문즉답" src="https://media-sparta.s3.ap-northeast-2.amazonaws.com/media/tempfiles/community/b24f7517-eb21-4120-a9fa-7f17f40ea418MjQ0MDk4Ljc5MDI0MDI2MDQ4MTY2NjAwNjY5Mjc3NA=.png"> &lt;제 작업&gt;<img alt="스파르타 즉문즉답" src="https://media-sparta.s3.ap-northeast-2.amazonaws.com/media/tempfiles/community/82133704-5c2d-4070-9820-686291583fedNDI2MzAyLjUxMDUwNzQzMjUxNjY2MDA2NzI1MjM0.png"> <img alt="스파르타 즉문즉답" src="https://media-sparta.s3.ap-northeast-2.amazonaws.com/media/tempfiles/community/3b153ebe-ea74-4503-92f1-509ccd53d652NjI3Mjk0LjA3ODEzNzU2NjUxNjY2MDA2NzczNjU4.png">