Clear dependent activex comboboxes

I have a sheet with multiple activex comboboxes, some which are dependent on others. I have entered the following code to make those dependent comboboxes work, which is working fine for me.

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Also, I would like to add a button that would clear or reset this form. Which I have the following code for that, which did work until I added the previous code to make the dependent comboboxes work.

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I receive a run-time error 381:
Could not get the List property. Invalid property array index.

RunTime381.png
VBA error.png

So maybe if I provide some more information that will help?

My end plan is to create this form with multiple dependent activex comboboxes. I would like to have 3 buttons on the form: Save and close, Save and clear & Clear form.
So, the only thing I need help with is ensuring correct VBA code for my dependent activex comboboxes and code to clear the form for the user to start over.

Thank you so much, that worked!