Compatibility with PHP 7.4

Hi, I tried with different websites and configurations and concluded that the plugin doesn’t work with PHP 7.4 version.
I have everytime the same error (send as denied exception). I also tried to fix this with this article https://postmansmtp.com/storedrv-submission-exceptionsendasdeniedexception-mapiexceptionsendasdenied/ and it doesn’t work more.
I use elementor forms + POST SMTP.

This error is only with PHP 7.4. Works fine when I downgrade to 7.3.

Do you think you have a solution for this? Or is there an update of the plugin planned soon?

Thank you very much.