Make sure your keyboard is detected in Synapse first. I had to reinstall synapse to get this working but It's not worth using anyways. Doesn't seem to work with a single prime warframe and completely disables keyboard lighting when I use one. It did this with both my blackwidow chroma v2 and ornata chroma.
Antivirus apps are a necessity on your computer if you want to stay safe while online. However, many of them pick up false positives and may flag harmless files as suspicious, causing your apps to stop working. If this happened to a file required by Razer Synapse, you need to temporarily disable your antivirus. 2b1af7f3a8