diff --git a/src/models/Log.php b/src/models/Log.php
index dd29a1e..c0c52ec 100644
--- a/src/models/Log.php
+++ b/src/models/Log.php
@@ -45,9 +45,13 @@ public function defineRules(): array
         return $rules;
     }
 
-    public function getVariant(): Variant
+    public function getVariant(): ?Variant
     {
-        return Variant::findOne($this->variantId);
+        if ($this->variantId) {
+            return Variant::findOne($this->variantId);
+        }
+
+        return null;
     }
 
     public function validateVariant(string $attribute, ?array $params, InlineValidator $validator): void
diff --git a/src/services/Service.php b/src/services/Service.php
index 2e01f74..4038e13 100644
--- a/src/services/Service.php
+++ b/src/services/Service.php
@@ -75,6 +75,16 @@ public function sendMail(LogRecord $log, string $subject, ?string $templatePath
             $view->setTemplateMode($view::TEMPLATE_MODE_SITE);
         }
 
+        if (!$log->variantId) {
+            $error = Craft::t('craft-commerce-back-in-stock', 'Could not find Variant for Back In Stock Notification email.');
+            
+            BackInStock::error($error);
+            
+            $view->setTemplateMode($oldTemplateMode);
+            
+            return false;
+        }
+
         $variant = Variant::findOne($log->variantId);
 
         if (!$variant) {