Change: handle errored truenas pools (#3815)

src/widgets/truenas/widget.js

@@ -25,7 +25,7 @@ const widget = {
           healthy: entry.healthy,
           allocated: entry.allocated,
           free: entry.free,
-          data: entry.topology.data,
+          data: entry.topology?.data ?? [],
         })),
     },
   },