Kali Form: SMTP Error: Could not connect to SMTP host

Cannot send test email via Gmail SMTP/TLS or SSL
I have activated Gmail for IMAP following this
Check Gmail through other email platforms - Gmail Help (google.com)

Kindly give me a hand.

Bes Regards

Hi there

Sorry about it, please contact them here: [Contact Form builder with drag & drop for WordPress - Kali Forms] Support | WordPress.org

OK thank. I thought the plugin is from your company.