Crash when running AutoML

**System Information (please complete the following information):**
- Model Builder Version (available in Manage Extensions dialog): 16.13.9.2235601
- Visual Studio Version: 17.5.2
Microsoft.ML 3.0.0-preview.22621.2
Microsoft.ML.AutoML 0.21-preview.22621.2

**Describe the bug**

Model builder crashes repeatedly after regression training is complete when trying to generate code, which does not get generated. Log attached. If you cancel out of the error model training is complete and you can move on to the next step.

**To Reproduce**
Try to train on a dataset - same behaviour on 3 datasets
1. Create new project
2. Add machine learning model
3. Select Value Prediction
4. Train Local
5. Select data file
6. Select columns
7. Train
Crash happens at end of training - see screenshot

**Additional context**
Add any other context about the problem here.
[MLModel1-Z958W5.txt](https://github.com/dotnet/machinelearning-modelbuilder/files/11000069/MLModel1-Z958W5.txt)

Inizia riproducendo il workflow di regressione riportato nell’issue e ispeziona il log allegato MLModel1-Z958W5.txt. Il lavoro è completato quando l’addestramento termina senza il crash e viene generato il codice, così da poter raggiungere il passaggio successivo.

Scritto dal modello di indicizzazione a partire dal testo della issue.