Can't send emails through Gmail anymore

[MillikenChurch]

Hi, I have been sending emails through PowerChurch(PC) in the past with Gmail, but it seems like something may have changed on the Google side and now I can't seem to send anything. I am trying to send out my contribution statements.

The SMTP configuration is correct, and I have my gmail set to allow less secure access, and when I press the "Authorize" button in PC, it says a screen should pop up for me to sign in with my gmail account to authorize it, but that screen does not pop up.

How to do I give PowerChurch permission to send email through Gmail now?