Workflow send email related contact error

I am having the following problem

I am creating a workflow in which when I create a meeting I email the contact assigned to the meeting but it does not work.

Attached are screenshots of what I am doing.

Log output:

I have tried sending the email to a specific account and it works.
I have tried to send the email to the assigned user and if it works

Can anyone help me?

Can anyone help me?

please, i need help

In your meetings module, do you see records under Contacts Subpanel? Are they related to Contacts?

-yes, the contact I have selected appears in the contacts sub-panel
-yes, it is related to the contact

So have you tried this on New Meeting record? the Workflow is set to Run on New Records.
Create a new meeting record related to Contact with Email address, what do you see in the logs?

Sure, I do it like you say
This is what appears to me in suitecrm.log
231c734bd4a806aad51e8260aa506f146a3a2f6f_2_690x98

What do you think might be happening?