Integrating zapier with mautic 500error

Your software
My Mautic version is: v4.2.1
My PHP version is: PHP Version 7.4.28
My Database type and version is: 10.3.34-MariaDB

Your problem
My problem is: I am trying to integrate zapier with mautic but I am getting 500 error
Screenshot 2022-04-02 at 19.08.50

so I tried to contact zapier support but they say the issue is from mautic side so am not able to figure this out what can I do to solve this