Magento 2 - Fatal Error "Can't create directory" var/generation/Magento/
This is a permission problem, Magento is unable to write to your var
directory.
Please follow the official documentation to setup your permissions properly.
This should help - it sets your permissions based on magento documentation.
sudo find . -type d -exec chmod 770 {} \; && sudo find . -type f -exec chmod 660 {} \; && sudo chmod u+x bin/magento
Please change the generation folder rewrite permission. Thats work for me.
sudo chmod -R 777 var/*