Error: The server returned a non-specific error when trying to get data from the data source

"Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator."

At a time this issue occurred in Production, QA, UAT. These 3 environments have configured with third party data source. This form has been working for months without any issues. I am thinking that some changes done in our third party data source or third party data source network issues.

I checked with Logs, but i could not understand what is the main issue.

Leaving Monitored Scope (GetFileAndMetaInfo). Execution Time=18.773335717249

Leaving Monitored Scope (GetWebPartPageContent). Execution Time=18.9809039975751

Leaving Monitored Scope (PostResolveRequestCacheHandler). Execution Time=20.5576407057322

Error while executing web part: System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> 
InnerException 1: System.IO.IOException: The handshake failed due to an unexpected packet format.    
 at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)    
 at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)    
 at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)    
 at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)    
 at System.Threading.ExecutionContext.runTryCode(Object userData)    
 at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)    
 at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)    
 at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result)    
 at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size)    
 at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size)    
 at System.Net.ConnectStream.WriteHeaders(Boolean async)     -
 -- End of inner exception stack trace ---    
 at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)    
 at System.Net.HttpWebRequest.GetRequestStream()    
 at Microsoft.SharePoint.WebControls.SoapDataSource.GetResponseString(SoapCommand currentSoapCommand)    
 at Microsoft.SharePoint.WebControls.SoapDataSource.ExecuteInternal(SoapCommand currentSoapCommand)    
 at Microsoft.SharePoint.WebControls.BaseXmlDataSource.Execute(String request)    
 at Microsoft.SharePoint.WebControls.BaseXmlDataSource.GetXmlDocument()    
 at Microsoft.SharePoint.WebControls.SingleDataSource.GetXPathNavigatorInternal()    
 at Microsoft.SharePoint.WebControls.SingleDataSource.GetXPathNavigator()    
 at Microsoft.SharePoint.WebControls.SyncMergedDataSource.GetXPathNavigator()    
 at Microsoft.SharePoint.WebControls.AggregateDataSourceView.get_AggregateNavigator()    
 at Microsoft.SharePoint.WebControls.SingleDataSource.GetXPathNavigator()    
 at Microsoft.SharePoint.WebPartPages.DataFormWebPart.GetXPathNavigator(String viewPath)    
 at Microsoft.SharePoint.WebPartPages.DataFormWebPart.PrepareAndPerformTransform(Boolean bDeferExecuteTransform)

Could anybody help me to find the error from above logs.

Thanks  & Regards