Gmail deny access

Hi

I set up following instructions although the video on here seems out of date.

Anyway I managed to paste in both IDs required, then the final stage where Postman needs to be granted access to google account, completed this but when I clicked on ‘Allow’

Google gave the message of ‘user does not have the authority’ or words to that effect.

any ideas?

https://ww.wp.xz.cn/plugins/postman-smtp/