The content cannot be set on a StreamedResponse instance.

Author: Nick Goris

src/Middleware/MinifyResponse.php

@@ -4,6 +4,7 @@
 
 use Closure;
 use Nckg\Minify\Minifier;
+use Symfony\Component\HttpFoundation\StreamedResponse;
 
 class MinifyResponse
 {
@@ -20,7 +21,7 @@ public function handle($request, Closure $next)
         /** @var Response $response */
         $response = $next($request);
 
-        if (!app()->isLocal()) {
+        if (!app()->isLocal() and false === is_a($response, StreamedResponse::class)) {
             $response->setContent((new Minifier())->html($response->getContent()));
         }