Error setting gmail smtp (third party)

Hi,

I get an error pop up message when trying to send a test mail from smtp gmail settings:

Request Error not JSON
Fatal Error: cannot declare class phpmailerExceptionm because the name is already in use…

I know it’s not ideal, but currently I have very few registered users so I want to use my Gmail account to sent emails for now.

All the setting are correct and enabled – working fine with Contact form 7.

Thanks