Cron is not starting

Hi there,

I hope you are doing well. I am new in the ProjeQtOr community, so apologize me in advance if I ask dumb questions.

I have just installed a new instance of ProjeQtOr V10.0.4 but I can't manage to get the cron working. Each time I try to start the cron, the cron activation button comes back in red.
You will find below what I get in the log file :
2022-08-31 11:42:53.185 ***** ERROR ***** [V10.0.4] EXCEPTION *****
2022-08-31 11:42:53.185 ***** ERROR ***** [V10.0.4] on file '/www/xxx/public/model/Cron.php' at line (434)
2022-08-31 11:42:53.185 ***** ERROR ***** [V10.0.4] cause = Call to undefined function getmypid()
2022-08-31 11:42:53.185 ***** ERROR ***** [V10.0.4] => #0 /www/xxx/public/tool/cronRun.php (33) -> run()

For information, the php user has write access on directory /www/xxx/public/files/cron

Could you tell what is going on and if I have done something wrong ? Thank you for your feedback.

Regards,

Olivier