修复exists判断

app/AdminAgent/Controllers/AgentProductController.php

@@ -119,7 +119,7 @@ class AgentProductController extends AdminController
 	{
 		$save_path = 'agent/qrcode/' . Admin::user()->id;
 		$filename = $save_path . '/' . $agent_product_id . '.jpg';
-		if (Storage::exists($filename)) {
+		if (Storage::disk('public')->exists($filename)) {
 			return redirect(Storage::disk('public')->url($filename));
 		}