CouchbaseException thrown when Cluster.Collection called

Couchbase.CouchbaseException: Exception of type 'Couchbase.CouchbaseException' was thrown.
at Couchbase.Core.ClusterNode.ExecuteOp(Func`4 sender, IOperation op, Object state, CancellationTokenPair tokenPair) in C:\Users\Jeff Morris\source\couchbase-net-client\src\Couchbase\Core\ClusterNode.cs:line 568
at Couchbase.CouchbaseBucket.SendAsync(IOperation op, CancellationTokenPair tokenPair) in C:\Users\Jeff Morris\source\couchbase-net-client\src\Couchbase\CouchbaseBucket.cs:line 234
at Couchbase.Core.Retry.RetryOrchestrator.RetryAsync(BucketBase bucket, IOperation operation, CancellationTokenPair tokenPair) in C:\Users\Jeff Morris\source\couchbase-net-client\src\Couchbase\Core\Retry\RetryOrchestrator.cs:line 181
at Couchbase.KeyValue.CouchbaseCollection.GetCidAsync(String fullyQualifiedName, Boolean sendAsBody, Boolean retryIfFailure) in C:\Users\Jeff Morris\source\couchbase-net-client\src\Couchbase\KeyValue\CouchbaseCollection.cs:line 1094
at Couchbase.KeyValue.CouchbaseCollection.PopulateCidAsync(Boolean retryIfFailure, Boolean forceUpdate) in C:\Users\Jeff Morris\source\couchbase-net-client\src\Couchbase\KeyValue\CouchbaseCollection.cs:line 1031
at Couchbase.KeyValue.CouchbaseCollection.PopulateCidAsync(Boolean retryIfFailure, Boolean forceUpdate) in C:\Users\Jeff Morris\source\couchbase-net-client\src\Couchbase\KeyValue\CouchbaseCollection.cs:line 1049
at Couchbase.KeyValue.CouchbaseCollection.UpsertAsync[T](String id, T content, UpsertOptions options) in C:\Users\Jeff Morris\source\couchbase-net-client\src\Couchbase\KeyValue\CouchbaseCollection.cs:line 528
at LoadTester.Program.RunKv(ICouchbaseCollection collection, Int32 timesToRun, Boolean displayTimes) in C:\Users\Jeff Morris\source\temp\LoadTester\Program.cs:line 262
at LoadTester.Program.Main(String[] args) in C:\Users\Jeff Morris\source\temp\LoadTester\Program.cs:line 117
----------------------Context Info--------------------------
{"DispatchedFrom":null,"DispatchedTo":null,"DocumentKey":"","ClientContextId":"64","Cas":0,"Status":8,"BucketName":"default","CollectionName":null,"ScopeName":null,"Message":"KV Error:

{Name=\"NO_BUCKET\", Description=\"Not connected to any bucket\", Attributes=\"conn-state-invalidated\"}

","OpCode":"GetCidByName"}