...
Before importing data from Excel or CSV files by using the Excel/CSV Import or Sync features, you must remove auto usages of Excel Import Plugin, since 20.0 version its no longer available to use. Learn more about automated project usages >>
To remove the Excel Import Plugin usage from your project
...
Before importing data from Excel file by using the Excel/CSV Import or Sync features, we recommend to make sure the data in your Excel file is in line. As shown in the following figure, the merged cells are eliminated by showing nested structure in line. Learn more about preparing Excel file to import >>
The comparison of Excel tables available to import by using the Excel Import Plugin and Excel/CSV Sync or Excel/CSV Import features.
...