I can't find, load or read my tabular data properly

This can be for a few reasons, including unknown file extension or format of the table. Here are a few things you can try to solve the issue:

• Make sure the data is in one of the following formats: .csv, .xls, .xlsx, .dat, .data, and .txt.
• Make sure that the file contains only one row for the header.
• Make sure you select the correct decimal format, column separator, and file encoding.
• Make sure the number of columns in the header and the data row are consistent (i.e. the same number of columns in header and data).