Lumion live sync error rhino 8

When i try to add the lumion live sync plugin i keep getting this error message

Any help??? Thanks in advance

Hi Mostafa -
Where does that .yak file come from?
Rhino doesn’t open such files, but double-clicking it from the file location in Windows Explorer should install that. Alternatively, you can rename to .zip and extract plug-in files.
Also note that support resources for Lumion are liked to from the F4R page: Lumion LiveSync for Rhino | Food4Rhino
-wim