"The first row (table header) of the imported table is invalid. Please use fields for either Quick Mode or Full Mode. Refer to the ExcelPort documentation for more information."
Hello,
Thank you for contacting us about this Excelport error. From what I could gather after a few Google searches, it looks like this error may be related to the format of the sheet you are trying to import. For example, a difference between a Google sheet and a Microsoft Excel Spreadsheet might cause invalid input.
ExcelPort is a premium plugin, so I advise contacting the developers through their ticket system.
Best,
Christopher M.