Missing or invalid headers when importing a file

What means missing or invalid headers when I try to import a file?

"We found an error with your CSV file, and we could not continue with the process: Missing headers"

When importing you can receive this error in one of these cases: 

• Your document doesn't have any headers.
• Your document doesn't have required headers. In this case, we'll show you what headers are missing.
• Your document has headers, but in an incorrect format. 

Other common mistakes are:

• Your document has duplicated rows (venues with the same id or name etc)
• You haven't filled all the required fields.

Also, please note, if you are having troubles importing in Excel, please try CSV.