From b3d73edbbd1aa2436df5b4f91218f71f049e1538 Mon Sep 17 00:00:00 2001
From: Roman Zipp <ich@ich.wtf>
Date: Mon, 10 Sep 2018 12:28:04 +0200
Subject: [PATCH] Fix null error exception

---
 src/Models/Monitor.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Models/Monitor.php b/src/Models/Monitor.php
index 127358c0..0be06bf4 100644
--- a/src/Models/Monitor.php
+++ b/src/Models/Monitor.php
@@ -112,7 +112,11 @@ public function getRemainingSecondsAttribute(): ?float
             return null;
         }
 
-        $secondsRunning = now()->getTimestamp() - $this->created_at->getTimestamp();
+        if (!$this->started_at) {
+            return null;
+        }
+
+        $secondsRunning = now()->getTimestamp() - $this->started_at->getTimestamp();
 
         return (float) ($secondsRunning - ($secondsRunning * $this->progress / 100));
     }