Sendmail action error

I have some sites made with older versions of Wappler that use send email actions.
Now with the new version of Wappler I had to modify some configurations of a site and by changing the method with the setting of the mailer in the Global section, the email sender no longer works and reports me an error that I cannot understand, also because the files are present on the server
Where am I wrong?




Schermata 2021-03-09 alle 22.17.21

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