ERROR : Schema mismatch for input column

[iluveu28]

System information

• OS version/distro: Linux
• .NET Version (eg., dotnet --info): 5

Issue

When I got to the training step - https://dotnet.microsoft.com/learn/ml-dotnet/get-started-tutorial/train

It failed with below error. Why and how to fix it?

Source code / logs

Schema mismatch for input column 'TIU_SOC_tf_CharExtractor': expected Expected known-size vector of Single, got Vector
Parameter name: inputSchema

at Microsoft.ML.ModelBuilder.AutoMLService.Experiments.AutoMLExperiment`3.d__21.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.ML.ModelBuilder.AutoMLEngine.d__26.MoveNext() in /_/src/Microsoft.ML.ModelBuilder.AutoMLService/AutoMLEngineService/AutoMLEngine.cs:line 150

[michaelgsharp]

Did you do anything different than what is in that tutorial?

@JakeRadMSFT any ideas?