Getting error on Cluster name validation

I checked my Course Overview status and noticed I failed Connection cluster name validation. I was able to connect using cluster0 so it looks like i forgot to change the name to sandbox (although the Cluster Label says Sandbox?). Cluster apparently cannot be renamed and I cannot create another cluster. Is there anything I can do?

Drop the existing cluster and create a new one with expected name sandbox…

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I terminated the cluster and created a new Cluster as Sandbox . Unfortunately I get the error below after entering user@M001# mongo “mongodb+srv://sandbox.z4usy.mongodb.net” at the command line. I would like to finish last item to complete the Basic training. Btw the training has taken me way over the expected advertised time to complete and mainly due to these connection misunderstandings/issues. Please provide any assistance. Thank you!

snippet from longer text…
_getErrorWithCode@src/mongo/shell/utils.js:25:13
DB.prototype._getCollectionInfosCommand@src/mongo/shell/db.js:943:1
DB.prototype.getCollectionInfos@src/mongo/shell/db.js:993:20
DB.prototype.getCollectionNames@src/mongo/shell/db.js:1031:16
shellHelper.show@src/mongo/shell/utils.js:869:9
shellHelper@src/mongo/shell/utils.js:766:15
@(shellhelp2):1:1

Post a screenshot of what you are doing that causes this error.