Hello,

I'm using Opencart 2.0.1.1 and only in exporting customers I receive this error:

mb_substr() expects parameter 1 to be string, array given in file /Applications/MAMP/htdocs/oc2-testdev/vendors/phpexcel/PHPExcel/Shared/String.php on line 575

ExcelPort 2.1.2 

I've added custom fields to Customer Address.

Thanks

Hello Rosario, 

Can you please try updating to the newest version of ExcelPort and see if the issue is now fixed?

Hope this helps!