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After updating to WP 5.5 and switched to PHP V7 I can’t send test emails anymore.
Clicking on the button “send test mail” triggers following error:
Fatal error: Cannot declare class PHPMailer\PHPMailer\SMTP, because the name is already in use in /home/public_html/mysite/wp-includes/PHPMailer/SMTP.php on line 30
I am using all standard settings with your plugin.
Can you provide a quick fix for this please?