Problem running command shell job

I can’t manage to let scheduled tasks work. Cron is running and I can see in the log my job started

INFO[2020-10-20T15:10:00Z] cron_run_jobs.php cronjobid: 7 priority=1 entity=1 label=Backup Completo - not qualified channel=stdout iteration=3

The job (command shell job) never starts. If I run it manually (from web interface) everything works. Also, if I run it with


the result is Result: No active jobs found. but the job exists.

Any ideas?