Failed to complete test myMLApp project

[RauHer]

System Information (please complete the following information):

• Model Builder or CLI Version: 2022 v.17.18.0
• Visual Studio Version (if applicable): 2022/2026 Community

Describe the bug

• On which page of the tutorial did you run into an issue (URL): https://dotnet.microsoft.com/en-us/learn/ml-dotnet/get-started-tutorial/train
• Clear description of the problem: Not able to train the model on the data set for a prediction as described in the URL above.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen. I expected the data to be used to train the model

Screenshots
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Additional context
Add any other context about the problem here.

[tuanduy35399]

I'm also face to the same issue.
My configuration:
Model Builder or CLI Version: 2022 v.17.19.2
Visual Studio 2026 Community
Describe bug:
I have finished my training based on this tutorial, which I did a few days ago.
https://dotnet.microsoft.com/en-us/learn/ml-dotnet/get-started-tutorial/train
But today is not my day. Something is not working the way it used to.
Hope you will fix it soon. I need to complete my report.