When I upload a database to Sequel Pro, I often get this 'file read error':
An error occurred when reading the file, as it could not be read in the encoding you selected (Autodetect - Unicode (UTF-8)).
To solve this, delete all the tables and try again with encoding 'Western: Mac OS Roman'.
See: https://www.bramvandenbulcke.be/en/kb/sequel-pro-file-read-error-when-uploading-database