If your project require GI Cache, You have to calculate your Irradiance Map and Light cache file then upload them with your project.
If you do not know how to create Irradiance Map and Light cache file. Below are some tips for you.
Step 1: Enable GI setting and setting up for yourself.
Step 2: Create path file Vrlmap/Vrmap and save to your project
Save your Vrlmap/Vrmap file
Setup lighcache: chose "From file" and click save
Step 3: Go to V-Ray -> Enable "Don't render final image"
Then clieck Render button for create your file Vrlmap/Vrmap.
Step 4: Disable "Don't render final image" ->
Go to GI tab and select path for Vrlmap/Vrmap
Chose Irradiance map mode "From file", select path vrmap file
At Light cache setting chose "From file", select path vrlmap file