broken! Graph not showing

Watcher/Controllers/ServerController.cs

@@ -166,5 +166,18 @@ public class ServerController : Controller
         return PartialView("_ServerCard", servers);
     }
 
+    public async Task<IActionResult> ServerDetailsPartial()
+    {
+        var servers = _context.Servers.ToList();
+
+        foreach (var server in servers)
+        {
+            server.IsOnline = (DateTime.UtcNow - server.LastSeen).TotalSeconds <= 120;
+            await _context.SaveChangesAsync();
+        }
+
+        return PartialView("_ServerDetails", servers);
+    }
+
 
 }