fix: Ensure CMS < 5 compat

Author: fsbraun

CHANGELOG.rst

@@ -7,7 +7,8 @@ Changelog
 
 * feat: Refactored CSS for faster and more reliable loading by @fsbraun
 * feat: Removed link and button preview
-* fix: Python 3.9 compatibility
+* fix: Some UI Components were not discovered by the `{% plugin %}` template tag in django CMS 5
+* fix: Restored Python 3.9 compatibility
 * chore: Update node version
 * chore: Remove bootstrap dependency
 

djangocms_frontend/plugin_tag.py

@@ -77,7 +77,7 @@ def get_plugin_class(settings_string: str | type) -> type:
 def setup():
     allowed_plugin_types = tuple(get_plugin_class(cls) for cls in getattr(settings, "CMS_COMPONENT_PLUGINS", []))
 
-    for plugin in plugin_pool.get_all_plugins(root_plugin=False):
+    for plugin in plugin_pool.plugins.values():  # We'll check all plugins irrespectivly of placeholder config
         if not issubclass(plugin, allowed_plugin_types):
             continue
         tag_name = plugin.__name__.lower()