Hi,
It's recommended to setup SSL connection. You can also use file import without SSL. More information on how to setup the connection between Standard ERP and Flex.bi here: https://docs.flex.bi/support-center/how-to-set-up-standard-erp-https-with-self-signed-
Make sure to follow this instruction If you are using Flex.bi enterprise: https://docs.flex.bi/support-center/https-or-ssl-setup
Best Regards,
Rasmus