Cron error - by: dep@eca.fr

I've got Cron error in a log file:

2019-02-04 19:05:13.067 ***** ERROR ***** [V7.3.4] cause = call_user_func() expects parameter 1 to be a valid callback, function 'cronimputationAlertCronTeamManager' not found or invalid function name
2019-02-04 19:05:13.136 ===== TRACE ===== Cron error : Une erreur est survenue le 2019-02-04 à 19:05:13