'Theme not found: :theme', 'name_required' => 'Theme name is required.', 'name_string' => 'Theme name must be a string.', 'name_max' => 'Theme name may not be greater than 255 characters.', 'type_required' => 'Theme type is required.', 'type_invalid' => 'Theme type must be core or module.', 'target_required' => 'Theme target is required.', 'target_invalid' => 'Theme target must be admin or user.', 'module_name_required' => 'Module name is required for module themes.', 'module_name_string' => 'Module name must be a string.', 'module_name_max' => 'Module name may not be greater than 255 characters.', 'cannot_uninstall_active' => 'Cannot uninstall active theme.', ];