Dear All. I am getting bellow error while opening Microsoft Report.  VS 2019, MVC. Please any body can help me?

An unhandled exception occurred while processing the request.

ArgumentException: Format of the initialization string does not conform to specification starting at index 0.

System.Data.Common.DbConnectionOptions.GetKeyValuePair(string connectionString, int currentPosition, StringBuilder buffer, bool useOdbcRules, out string keyname, out string keyvalue)

ReportProcessingException: Query execution failed for dataset 'DataSet1'.
Format of the initialization string does not conform to specification starting at index 0.

AspNetCore.ReportingServices.OnDemandProcessing.RuntimeLiveQueryExecutor.ExecuteReader(IJobContext jobContext, DataSourceErrorInspector errorInspector, string commandText)

ProcessingAbortedException: An error has occurred during report processing.
Query execution failed for dataset 'DataSet1'.
Format of the initialization string does not conform to specification starting at index 0.

AspNetCore.ReportingServices.OnDemandProcessing.AbortHelper.ThrowIfAborted(CancelationTrigger cancelationTrigger, string uniqueName)

LocalProcessingException: An error occurred during local report processing.;An error has occurred during report processing.
Query execution failed for dataset 'DataSet1'.
Format of the initialization string does not conform to specification starting at index 0.

AspNetCore.Reporting.InternalLocalReport.InternalRender(string format, bool allowInternalRenderers, string deviceInfo, PageCountMode pageCountMode, CreateAndRegisterStream createStreamCallback, out Warning[] warnings)