How to export and then import excel into General Journal - no using rapidstart

Hi all,

NAV 2016, 9.0.44974.0

I am supporting a customer(end user) who wants to import lines from Excel instead of writing them manually in General Journal. For safety sake the customer is not allowed to use RapidStart.

I have been doing this:
Being on that General Journals, I am exporting to Excel, see attached
Image may be NSFW.
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Before I export to Excel, I enter Data to check that I can import same data again in Dynamics NAV 2016.

I delete my General Journal --> Standing on action tab on ribbon --> Import from Excel.
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I choose these option before I import.

Then I received this fault:
Image may be NSFW.
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How can I proceed from here or what to do?
Thanks