If the error is indeed about permissions, then try repairing the permissions for system files and folders.
On macOS 10.10 Yosemite or earlier, you can Repair Permissions in Disk Utility on a selected disk.
On macOS 10.11 El Capitan or later, that option is removed, as macOS itself should keep system permissions as they should be, and disallow others (e.g. installers) to change any of that.
Besides the permissions for system folders and files, there are also permissions on other folders and files, e.g. in the user directory (including Desktop). You may have to check those manually (Get Info﹥Sharing & Permissions). Make sure the files that you want to burn have at least read access.