Cannot refresh data from Azure Blob container in an existing report

Hello dear community,

I am trying to solve a Power Query issue to refresh data from Azure Blob container storage. I am not able to refresh and getting the following error message.

Unexpected error: Value cannot be null.
Parameter name: str
Details:
Microsoft.Mashup.Evaluator.Interface.ErrorException: Value cannot be null.
Parameter name: str ---> System.ArgumentNullException: Value cannot be null.
Parameter name: str ---> System.ArgumentNullException: Value cannot be null.
Parameter name: str
at Microsoft.Mashup.Common.UriMethods.EscapeDataString(String str, Boolean legacyBehavior)
at Microsoft.Mashup.Engine1.Library.Uris.UriHelper.BuildQueryString(NameValueCollection queryParameters)
at Microsoft.Mashup.Engine1.Library.Uris.UriHelper.AddQueryRecord(UriBuilder uriBuilder, NameValueCollection newQueryString)
at Microsoft.Mashup.Engine1.Library.Http.HttpResourceCredentialDispatcher.UriCredentialDispatcher.Apply(ParameterizedCredential credential)
at Microsoft.Mashup.Engine1.Library.Http.HttpRequest.ApplyCredentialsToUri(Uri uri, ResourceCredentialCollection credentials)
at Microsoft.Mashup.Engine1.Library.Http.Request.CreateWebRequest(Uri uri, ResourceCredentialCollection credentials)
at Microsoft.Mashup.Engine1.Library.Http.Request.CreateResponse(ResourceCredentialCollection credentials)
at Microsoft.Mashup.Engine1.Library.Http.Request.GetResponseCore(ResourceCredentialCollection credentials)
at Microsoft.Mashup.Engine1.Library.Http.RetryPolicy.Execute[TResult](IEngineHost host, Func`1 func)
at Microsoft.Mashup.Engine1.Library.Http.Request.GetResponse(ResourceCredentialCollection credentials, RetryPolicy retryPolicy, SecurityExceptionCreator securityExceptionCreator, Boolean tokenRefreshed)
at Microsoft.Mashup.Engine1.Library.AzureBase.AzureBaseHelper.GetResponse(Request request, SecurityExceptionCreator securityExceptionCreator, Int32[] ignoredStatusCodes)
at Microsoft.Mashup.Engine1.Library.AzureBlobs.ContainerTableValue.BlobListEnumerator.LoadBlobsList(RecordValue& newQueryParameters)
at Microsoft.Mashup.Engine1.Library.AzureBlobs.ContainerTableValue.GetEnumerator()
at Microsoft.Mashup.Engine1.Language.Query.SelectRowsQuery.SelectRowsEnumerable.GetEnumerator()
at Microsoft.Mashup.Engine1.Language.Query.SkipTakeEnumerable.GetEnumerator()
at Microsoft.Mashup.Engine1.Language.Query.QueryTableValue.GetEnumerator()
at Microsoft.Mashup.Engine1.Runtime.TableValue.Microsoft.Mashup.Engine.Interface.ITableValue.GetEnumerator()
at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.ValuePreviewValueSource.TableValuePreviewValueSource.SerializeRows(Int32 count)
at Microsoft.Mashup.Evaluator.SimpleDocumentEvaluator.ValuePreviewValueSource.TableValuePreviewValueSource.get_SmallValue()
at Microsoft.Mashup.Evaluator.Interface.TracingPreviewValueSource.get_SmallValue()
at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.<>c__DisplayClass0_0.<RunStub>b__0()
at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(String entryName, IEngineHost engineHost, IMessageChannel channel, Action action)
--- End of inner exception stack trace ---
at Microsoft.Mashup.Evaluator.EvaluationHost.<>c__DisplayClass17_0.<TryReportException>b__1()
at Microsoft.Mashup.Common.SafeExceptions.IgnoreSafeExceptions(IEngineHost host, IHostTrace trace, Action action)
at Microsoft.Mashup.Evaluator.EvaluationHost.TryReportException(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Exception exception)
at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(String entryName, IEngineHost engineHost, IMessageChannel channel, Action action)
at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.<>c__DisplayClass12_1`1.<OnBeginGetResult>b__0()
at Microsoft.Mashup.Evaluator.EvaluationHost.ReportExceptions(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Action action)
at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetResult[T](IMessageChannel channel, BeginGetResultMessage message, Action`1 action)
at Microsoft.Mashup.Evaluator.RemoteDocumentEvaluator.Service.OnBeginGetPreviewValueSource(IMessageChannel channel, BeginGetPreviewValueSourceMessage message)
at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.ChannelMessenger.OnMessageWithUnknownChannel(IMessageChannel baseChannel, MessageWithUnknownChannel messageWithUnknownChannel)
at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.EvaluationHost.Run()
at Microsoft.Mashup.Container.EvaluationContainerMain.Run(Object args)
at Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass9_0.<CreateAction>b__0(Object o)
at Microsoft.Mashup.Container.EvaluationContainerMain.SafeRun(String[] args)
at Microsoft.Mashup.Container.EvaluationContainerMain.Main(String[] args)
--- End of inner exception stack trace ---
at Microsoft.Mashup.Evaluator.EvaluationHost.OnException(IEngineHost engineHost, IMessageChannel channel, ExceptionMessage message)
at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
at Microsoft.Mashup.Evaluator.Interface.IMessageChannelExtensions.WaitFor[T](IMessageChannel channel)
at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.WaitFor(Func`1 condition, Boolean disposing)
at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.get_SmallValue()
at Microsoft.Mashup.Evaluator.Interface.TracingPreviewValueSource.get_SmallValue()
at Microsoft.Mashup.Host.Document.Analysis.PackageDocumentAnalysisInfo.PackagePartitionAnalysisInfo.SetPreviewValue(EvaluationResult2`1 result, Func`1 getStaleSince, Func`1 getSampled)

Does anybody have a similar experience and any solution for this problem?

Thank you in advance