in ml learning tutorial, no options in Column to select dropdown

**System Information (please complete the following information):**
- Model Builder or CLI Version:
- Visual Studio Version (if applicable):

**Describe the bug**
- On which page of the tutorial did you run into an issue (URL):
- Clear description of the problem:

**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.

**Screenshots**
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**Additional context**
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