- Set permission 0777 for folders: var/vesblockbuilder/, var/vespagebuilder/, pub/pagebuilder/livecss/customize/
- Disable mod_security in hosting
- Setup and enable the php extension: fileinfo (php_fileinfo.dll or fileinfo.so). Please find tutorials:
To install this extension you must have a working version of Magento 2 already installed. If you need help installing Magento 2, follow below sites and tutorials from magentocommerce.com, hope everything that you need are there.