An error occurred while communicating with the debugger.

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System.Net.Http.HttpRequestException: Http Request failed with status Forbidden Forbidden    at Mendix.Modeler.Debugger.Runtime.DebuggerClient.MakeDebuggerWebRequest(DebuggerRequest debugRequest, CancellationToken cancellationToken, Int32 timeout) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Debugger\Runtime\DebuggerClient.cs:line 193    at Mendix.Modeler.Debugger.Runtime.DebuggerClient.PerformRequest(DebuggerRequest request, Int32 timeout) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Debugger\Runtime\DebuggerClient.cs:line 171    at Mendix.Modeler.Debugger.Runtime.Messages.DebuggerRequest.Execute(Int32 timeout) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Debugger\Runtime\Messages\DebuggerRequest.cs:line 57    at Mendix.Modeler.Debugger.Runtime.DebuggerClient.StartSession(IEnumerable`1 breakpoints) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Debugger\Runtime\DebuggerClient.cs:line 63    at Mendix.Modeler.Debugger.Runtime.DebuggerController.StartDebugging(String url, SecureString password, ConnectionMode mode, IEnumerable`1 breakpoints) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Debugger\Runtime\DebuggerController.cs:line 83    at Mendix.Modeler.Debugger.View.DebuggerUI.<>c__DisplayClass52_0.<StartDebugging>b__1() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Debugger\View\DebuggerUI.cs:line 269    at Mendix.Modeler.Utility.BackgroundUtil.<>c__DisplayClass1_0`1.<Do>b__0(Object s, DoWorkEventArgs e) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Utility\BackgroundUtil.cs:line 29    at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)    at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
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1 answers
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i didn’t understand your question, if you place a debugger inside microflow and it throws error ? 

if that is the case, check you are running multilple instance of studio pro on my machine, if not restart your machine and check.

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