Warning: Undefined array key "label" in Drupal\ui_patterns\Definition\PatternDefinitionVariant->__construct() (line 35 of modules/contrib/ui_patterns/src/Definition/PatternDefinitionVariant.php).

[snapik]

There is a warning on module installation process.

[mika2na]

Please post your issue on https://www.drupal.org/project/issues/ui_patterns