(AADSTS7000218: The request body must contain the following parameter: 'client_assertion' or 'client_secret')

[ghafor]

Hi! I followed the exact instructions, and I received this error. Below is the complete error:
Unhandled Exception: System.AggregateException: One or more errors occurred. (AADSTS7000218: The request body must contain the following parameter: 'client_assertion' or 'client_secret'. Trace ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Correlation ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Timestamp: 2023-01-21 02:07:21Z) ---> Microsoft.IdentityModel.Clients.ActiveDirectory.AdalServiceException: AADSTS7000218: The request body must contain the following parameter: 'client_assertion' or 'client_secret'. Trace ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Correlation ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Timestamp: 2023-01-21 02:07:21Z ---> System.Net.Http.HttpRequestException: Response status code does not indicate success: 401 (Unauthorized). ---> System.Exception: {"error":"invalid_client","error_description":"AADSTS7000218: The request body must contain the following parameter: 'client_assertion' or 'client_secret'.\r\nTrace ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\r\nCorrelation ID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\r\nTimestamp: 2023-01-21 02:07:21Z","error_codes":[7000218],"timestamp":"2023-01-21 02:07:21Z","trace_id":"4f9d1c92-20bf-4ce3-ab3e-388353615e01","correlation_id":"fb10b266-a606-4ee8-a2c3-82875c3a4460","error_uri":"https://login.microsoftonline.com/error?code=7000218"} --- End of inner exception stack trace --- at Microsoft.IdentityModel.Clients.ActiveDirectory.HttpClientWrapper.<GetResponseAsync>d__30.MoveNext() --- End of inner exception stack trace --- at Microsoft.IdentityModel.Clients.ActiveDirectory.AdalHttpClient.<GetResponseAsync>d__211.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.IdentityModel.Clients.ActiveDirectory.AdalHttpClient.d__201.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.IdentityModel.Clients.ActiveDirectory.AcquireTokenHandlerBase.<SendHttpMessageAsync>d__67.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.IdentityModel.Clients.ActiveDirectory.AcquireTokenHandlerBase.<SendTokenRequestAsync>d__64.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.IdentityModel.Clients.ActiveDirectory.AcquireTokenByDeviceCodeHandler.<SendTokenRequestAsync>d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.IdentityModel.Clients.ActiveDirectory.AcquireTokenHandlerBase.<RunAsync>d__55.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext.<AcquireTokenByDeviceCodeAsync>d__24.MoveNext() --- End of inner exception stack trace --- at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification)
at ChannelSurfCli.Program.UserLogin() in C:\codes\ChannelSurfCli\Program.cs:line 191
at ChannelSurfCli.Program.Main(String[] args) in C:\codes\ChannelSurfCli\Program.cs:line 108`

[ilyalehrman]

You can fix it by going to the registered Azure app's Authentication section and switching Allow public client flows to Yes under Advanced settings.