Error on sending email to contact through forms on mautic 4

Product Support Mautic 4 Install/Upgrade Support
1

Your software
My Mautic version is: 4.2.1
My PHP version is: 7.4.27
My Database type and version is: mysql 8.0.22

Your problem
My problem is: When trying to send a mail to a contact through a standalone form, nothing happens.

These errors are showing in the log:

[2022-04-12 21:14:01] mautic.DEBUG: CAMPAIGN: Campaign triggered for event type form.submit(form / 1)  
[2022-04-12 21:14:01] mautic.DEBUG: CONTACT: System lead is being used  
[2022-04-12 21:14:01] mautic.DEBUG: CAMPAIGN: Current contact ID# 1  
[2022-04-12 21:14:01] mautic.DEBUG: CAMPAIGN: Contact does not have any applicable form.submit associations.

Steps I have tried to fix the problem: Cache cleared and Updated Schema on a Clean reinstall and a clean database.