vtiger gmail problem

https://www.dropbox.com/s/ljo4v2h6bvlxfaq/Screen%20Shot%202021-04-01%20at%204.28.52%20PM.png?dl=0

I have tried everything but I keep seeing this error when I try to setup gmail. I have also enable insecure apps.

Will getting SSL on my vtiger website domain solve this issue?

Any ideas? Please help

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Thank you in advance