Error When Clicking on new Tab - "The expression On Change you entered as the event property setting produced the following error"

Launa 1 Reputation point
2022-06-14T16:29:25.017+00:00

I have a main form in my Access database that has an error when you click on one of the 'Tabs' it throws an error:
211366-onchangeerror.png

I kind of understand that maybe something is missing or something for the OnChange, but I can't find this property any where. I have clicked everywhere on the form, every text box and label. Our Main form is pretty complicated. Yesterday I found a way to run the 'Database Documenter' and found that there is a [Event Procedure] onChange, but I still can't find this in design mode. Here is what is in the file right at the beginning of the Main Form:

211367-mainform.png

Is there anyone that can help me find this Property Event?
Thank you!

Launa

Microsoft 365 and Office | Access | Development
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