A total newbie, I've just installed Magento 2.1.2 CE (zip-file with sample data), verified the installation and then attempted to enable a couple of third-party extensions using the following commands:
php bin/magento module:enable Cminds_Supplierfrontendproductuploader php bin/magento module:enable Cminds_Marketplace php bin/magento setup:upgrade
The upgrade operation appears to fail with the following exceptions:
Module 'Cminds_Supplierfrontendproductuploader': Installing data... [Magento\Framework\Exception\SessionException] Area code not set: Area code must be set before starting a session. [Magento\Framework\Exception\LocalizedException] Area code is not set
I've seen a multitude of suggested work-arounds on GitHub (resetting the sample data, hacking PHP files, etc.) none of which has worked.
Anyone out there have any ideas?
I got past this by reinstalling Magento without the sample data. I'd quite like to know why, though.