ISTWCMS-7285: Fix uri for sized image block on existing blocks

src/Plugin/Block/UwCblImage.php

@@ -184,6 +184,11 @@ class UwCblImage extends BlockBase implements ContainerFactoryPluginInterface {
     $output['caption_format'] = $this->configuration['caption_format'] ?? 'underneath_photo';
     $output['caption_alignment'] = $this->configuration['caption_alignment'] ?? 'left';
 
+    // If the uri is not set, then set it.
+    if (!isset($output['image']['uri'])) {
+      $output['image']['uri'] = $this->fileUrlGenerator->generate($output['image']['dirname'] . '/' . $output['image']['basename'])->toString();
+    }
+
     // Load values in build array.
     $build = [
       '#theme' => 'uw_block_image',