Crash dashboard

The latest update crashes access to my dashboard and I get the following php error:

Fatal error: Uncaught Error: Undefined constant "DecaLog\DECALOG_VERSION" in /srv/mcfr-wp/wp-content/plugins/apcu-manager/includes/libraries/decalog-sdk/EventsLogger.php:12

Stack Trace
include_once()
/srv/mcfr-wp/wp-content/plugins/apcu-manager/includes/libraries/autoload.php:28
{closure}()
/srv/mcfr-wp/wp-content/plugins/apcu-manager/includes/libraries/decalog-sdk/Engine.php:197
DecaLog\Engine::eventsLogger()
/srv/mcfr-wp/wp-content/plugins/apcu-manager/apcu-manager.php:137
apcm_run()
/srv/mcfr-wp/wp-content/plugins/apcu-manager/apcu-manager.php:155
include_once('…')
/srv/mcfr-wp/wp-settings.php:517
require_once('…')
/srv/mcfr-wp/wp-config.php:117
require_once('…')
/srv/mcfr-wp/wp-load.php:50
require_once('…')
/srv/mcfr-wp/wp-admin/admin-ajax.php:22
{main}
thrown in /srv/mcfr-wp/wp-content/plugins/apcu-manager/includes/libraries/decalog-sdk/EventsLogger.php on line 12