clean install

web/core/modules/file/src/FileServiceProvider.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Drupal\file;
+
+use Drupal\Core\DependencyInjection\ContainerBuilder;
+use Drupal\Core\DependencyInjection\ServiceModifierInterface;
+use Drupal\Core\StackMiddleware\NegotiationMiddleware;
+
+/**
+ * Adds 'application/octet-stream' as a known (bin) format.
+ */
+class FileServiceProvider implements ServiceModifierInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function alter(ContainerBuilder $container) {
+    if ($container->has('http_middleware.negotiation') && is_a($container->getDefinition('http_middleware.negotiation')->getClass(), NegotiationMiddleware::class, TRUE)) {
+      $container->getDefinition('http_middleware.negotiation')->addMethodCall('registerFormat', ['bin', ['application/octet-stream']]);
+    }
+  }
+
+}