Error: querySrv ENOTFOUND _mongodb._tcp.myatlasclusteredu.mqferhg.mongodb.net in Mongo University

Hi Sir:

I am running a course lab exercise and I am getting the following error message:
Error: querySrv ENOTFOUND _mongodb._tcp.myatlasclusteredu.mqferhg.mongodb.net

I have mistakenly deleted the lab database before and rebuilt it, it seems to be caused by this reason, may I know how to fix it?