Update for Drupal 11

composer.json

@@ -29,5 +29,8 @@
         "drush.services.yml": "^9"
       }
     }
+  },
+  "require": {
+    "drupal/focal_point": "^2.1"
   }
 }

responsive_image_effect.info.yml

@@ -1,10 +1,11 @@
 name: Responsive image effect
 description: Replaces Drupal image style url generator with a scale and crop image effect that can be specified via URL arguments.
 package: Media
-core_version_requirement: ^9.4 || ^10
+core_version_requirement: ^10 || ^11
 
 type: module
 
 dependencies:
   - drupal:image
-  - drupal:focal_point
+  - focal_point:focal_point
+  - drupal:media

src/Entity/ResponsiveImageStyle.php

@@ -5,6 +5,7 @@
 use Drupal\Core\File\Exception\FileException;
 use Drupal\Core\StreamWrapper\StreamWrapperInterface;
 use Drupal\Core\StreamWrapper\StreamWrapperManager;
+use Drupal\Core\Utility\Error;
 use Drupal\image\Entity\ImageStyle;
 
 class ResponsiveImageStyle extends ImageStyle {
@@ -71,7 +72,8 @@ public function flush($path = NULL) {
       }
     }
     catch (\Exception $e) {
-      watchdog_exception('responsive_image_effect', $e, 'problem finding responsive image derivatives');
+      $logger = \Drupal::logger('responsive_image_effect');
+      Error::logException($logger, $e);
     }
 
     return $this;

src/PathProcessor/PathProcessorImageStyles.php

@@ -96,10 +96,11 @@ public function processInbound($path, Request $request) {
    *   Return true/false if the responsive image effect is set.
    */
   protected function imageStyleHasResponsiveEffect($image_style) {
-    $image_style = ImageStyle::load($image_style);
-    foreach ($image_style->getEffects() as $effect) {
-      if ($effect instanceof ResponsiveImageEffect) {
-        return TRUE;
+    if ($image_style = ImageStyle::load($image_style)) {
+      foreach ($image_style->getEffects() as $effect) {
+        if ($effect instanceof ResponsiveImageEffect) {
+          return TRUE;
+        }
       }
     }
     return FALSE;