VBA now getting Runtime Error 13 - Type Mismatch but used to work perfectly

I've used this code for over a year with no problem. This time it copies and pastes the first sheet of each workbook in the folder to the master workbook like it is supposed to, but then hangs up and give me an Error 13 Type Mismatch on this line (which is the third to last line in the code):

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The macro is:

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I would really appreciate any help you can give me on this. Thanks!

You will get that error if varLinks is empty.

Thanks, Norie!