Assuming your path is correct.
I notice you edited the fNAME filter to "*.xlsx*" which should be fine, though what I had in there originally was better.
My only guess is that it isn't finding any files to open.
In the VBEditor put an apostrophe at the start of the Application.ScreenUpdating=False so it looks like this:
That turns off that line of code for now by turning it into a comment.
Now press F8 to start to run the macro line by line. As you keep pressing F8 slowly the next line of code will execute. When you pass the fNAME = line of code that gets the first filename, stop and hover your mouse over the word fNAME. Does a filename popup for you to read?