diff --git a/inferium-gui.lua b/inferium-gui.lua
index 41a99ff..08aaf37 100644
--- a/inferium-gui.lua
+++ b/inferium-gui.lua
@@ -76,12 +76,14 @@ local function fetchAllHarvesters(serverName)
   end
 
   for k, harvester in pairs(harvesters) do
-    local payload, errMessage = net.sendQuery(serverName, { type = 'get-config', payload = { id = harvester.id } })
+    local response, errMessage = net.sendQuery(serverName, { type = 'get-config', payload = { id = harvester.id } })
 
     if errMessage then
       error('getAllHarvesters cannot get-config: ' .. errMessage, 0)
     end
 
+    local payload = response and response.payload
+
     if not payload then
       error('getAllHarvesters no payload returned for harvester ' .. harvester.id, 0)
     end