Version 9.0.4: ERROR Class 'OCP\Constant' not found

Update existing Nextcloud 21 install for GroupFolders App from 9.0.3 to 9.0.4 produces errors in the NC logging.

A recurring error during cron or similar is presumed.
Error: Class 'OCP\Constant' not found

Server configuration detail

Operating system: Debian 11.2 - Linux 5.10.0-10-amd64

Webserver: Apache2 - 2.4.52

Database: mysql 10.5.12 (MariaDB)

PHP version: 7.4.25

Nextcloud version: 21.0.7 - 21.0.7.0

Please refer to `Class 'OCP\Constant' not found` in version 9.0.4 · Issue #1867 · nextcloud/groupfolders · GitHub