Issue #2944011 by labboy0276: Layouts break Layout Builder

bootstrap_barrio.layouts.yml

 bb_cardbasic:
   label: Card basic
   category: Barrio
-  class: '\Drupal\ds\Plugin\DsLayout'
-  type: partial
-  template: templates/ds/ds-card-basic
+  template: templates/ds/layout--ds-card-basic
   regions:
     first:
       label: Content
 bb_cardtopimage:
   label: Card top image
   category: Barrio
-  class: '\Drupal\ds\Plugin\DsLayout'
-  type: partial
-  template: templates/ds/ds-card-top-image
+  template: templates/ds/layout--ds-card-top-image
   regions:
     first:
       label: Image
@@ -21,9 +17,7 @@ bb_cardtopimage:
 bb_cardimageoverlay:
   label: Card image overlay
   category: Barrio
-  class: '\Drupal\ds\Plugin\DsLayout'
-  type: partial
-  template: templates/ds/ds-card-image-overlay
+  template: templates/ds/layout--ds-card-image-overlay
   regions:
     first:
       label: Image
@@ -32,9 +26,7 @@ bb_cardimageoverlay:
 bb_cardheaderfooter:
   label: Card header footer
   category: Barrio
-  class: '\Drupal\ds\Plugin\DsLayout'
-  type: partial
-  template: templates/ds/ds-card-header-footer
+  template: templates/ds/layout--ds-card-header-footer
   regions:
     first:
       label: Header
@@ -45,9 +37,7 @@ bb_cardheaderfooter:
 bb_card3stack:
   label: Card three block stacked
   category: Barrio
-  class: '\Drupal\ds\Plugin\DsLayout'
-  type: partial
-  template: templates/ds/ds-card-3stack
+  template: templates/ds/layout--ds-card-3stack
   regions:
     first:
       label: First

templates/block/block.html.twig

@@ -36,6 +36,7 @@
     'block-' ~ plugin_id|clean_class,
     plugin_id == 'system_main_block' ? 'col-12',
     plugin_id == 'page_title_block' ? 'col-12',
+    plugin_id == 'System_breadcrumb_block' ? 'col-12',
   ]
 %}
 <div{{ attributes.addClass(classes) }}>