Unable to send emails from google account

Goodday, I am unable to send emails from manager. Error message is “The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Authentication Required. Learn more at”"

All parameters have been accurately inputed and still getting error message…
Email address
cran. . . . . . hub@gmail.com
Send a copy of every email to this address
Name
Cranfield Business Hub and Consulting
Paper size
Email sending format
SMTP server
Hostname
smtp.gmail.com
Port
SMTP credentials
Username
cranfieldbizhub
Password
•••••••••
Show password

Read this Guide: https://www.manager.io/guides/9100. Follow all relevant links in the Guide. If you still cannot resolve the problem, furnish all the information requested by the Guide. Show a screen shot of your Email Settings page, not a transcription. Obscure only proprietary information.

you should be including more information like, what version of manager you are using, what environment etc. But as @tut said, make sure you’ve read the guides and post more pertinent info for people to help you.

This looks like it’s going to be a 2FA or Google Apps Authentication issue. What have you done further to diagnose your problem?