* Did you install the Spice Guest Tools?
** Before you canCopy/Paste content between the Guest and the Host you must install the SPICE Guest Tools drivers.NOTE: Do make sure that you do NOT install the QEMU Guest Tools Drivers. These are not the same.
* Are you using Wayland?
** Clipboard functionality is not compatible with Wayland. If you are using it you need to disable it for the clipboard to work.