The first error means that the database you have selected in the connection being used by the Advanced File Manager does not have sufficient privileges to create the database tables needed by the advanced file manager.
Your host should supply a way to manage your MySQL databases such as PHPMyAdmin. In PHPMyAdmin, select the database being used by HTML editor, and go to the Permissions tab to manage the allowed permissions for your user.
The second error is pretty much the same, the /Uploads doesn't exist and the allowed permissions are not allowing the script to create it. You can create it manually.