Check if flash messages are strings

resources/views/admin/flash/message.blade.php

@@ -1,4 +1,7 @@
 @foreach (session('flash_notification', collect()) as $message)
+  @if (is_string($message))
+    <div class="alert alert-error">{!! $message !!}</div>
+  @else
     @if ($message['overlay'])
       @include('flash::modal', [
           'modalClass' => 'flash-modal',
@@ -22,6 +25,7 @@
         {!! $message['message'] !!}
       </div>
     @endif
+  @endif
 @endforeach
 
 {{ session()->forget('flash_notification') }}

resources/views/layouts/default/flash/message.blade.php

@@ -1,4 +1,7 @@
 @foreach (collect(session('flash_notification', collect()))->toArray() as $message)
+  @if (is_string($message))
+    <div class="alert alert-error">{!! $message !!}</div>
+  @else
     @if ($message['overlay'])
       @include('flash::modal', [
           'modalClass' => 'flash-modal',
@@ -6,22 +9,20 @@
           'body'       => $message['message']
       ])
     @else
-    <div class="alert
+      <div class="alert alert-{{ $message['level'] }}
-                    alert-{{ $message['level'] }}
            {{ $message['important'] ? 'alert-important' : '' }}"
            role="alert">
         @if ($message['important'])
           <button type="button"
                   class="close"
                   data-dismiss="alert"
-                aria-hidden="true"
+                  aria-hidden="true">&times;</button>
-        >&times;
-        </button>
         @endif
 
         {!! $message['message'] !!}
       </div>
     @endif
+  @endif
 @endforeach
 
 {{ session()->forget('flash_notification') }}