Run-Time Error '-2147024809 (80070057)': Could not find the specified object

I have no idea what to put as the title of this thread.

Here is what is happening...

I have an set of If Then Statements as follows:

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So basically, different things will happen depending on if a selection is made: External, Employee, Agency.

Yesterday, while testing this form multiple times, I kept finding that when I selected Agency and then put information under the following fields: "Cand_Ext", "CandLocComboBox", "Cand_Shift", "Cand_PS_ID" then saved the selection by clicking the command button, 'Add/Update' which then stores the data within the worksheet, the data within those four fields would not keep. When I would return to the candidate's name everything would be there except the information stored in those four fields.

But, when I selected Employee and entered information under those four fields, "Cand_Ext", "CandLocComboBox", "Cand_Shift", "Cand_PS_ID", and then 'add/update' and then returned later to that candidate, the information would still be there.

So,
Agency - info does NOT stay for "Cand_Ext", "CandLocComboBox", "Cand_Shift", "Cand_PS_ID"
Employee - info DOES stay for "Cand_Ext", "CandLocComboBox", "Cand_Shift", "Cand_PS_ID"

I decided to take a look this morning to see where the problem might lie. I opened up my practice document, which is a duplicate document of the one we use, but without confidential information in the values worksheet and it has example data rather than real data.

I went to my candidate tab within the MultiPage Userform and selected the name, George Washington, and I was given the following error:

Run-Time Error '-2147024809 (80070057)': Could not find the specified object. When debugging, the following line of code, from the above code, was highlighed,

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Since there are multiple lines of code like the one above, this is the one just under:

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I'm wondering if the two experiences are related, what the error means and how to fix it.

Yesterday, while using the UserForm using real data under live circumstances, I wasn't given this code when retrieving a candidate from the combobox.

I'm attaching the doc for reference:

ISW UserForm Original V0.xlsm

Oh! hello! That's because I deleted it. OK, that explains the error message and caused another but I fixed it because it was the same problem elswehere. That still leaves the other problem, but I will start a new thread because these two are obviously not related. Thank you!!

I have figured out the previous problem, too. I had the following code elsewhere that removed that information:

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