SMTP Error: Could not authenticate

Versions:
WordPress: 4.9.8
WordPress MS: No
PHP: 5.6.36
WP Mail SMTP: 1.3.3

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Host: smtp.gmail.com
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: Yes
Apache.mod_security: No
SMTP Debug:
2018-09-11 06:06:45	Connection: opening to ssl://smtp.gmail.com:465, timeout=300, options=array (
)
2018-09-11 06:06:46	Connection: opened
2018-09-11 06:06:46	SERVER -> CLIENT: 220 smtp.gmail.com ESMTP l195-v6sm41559981oib.17 - gsmtp
2018-09-11 06:06:46	CLIENT -> SERVER: EHLO www.tqb.li2.in
2018-09-11 06:06:46	SERVER -> CLIENT: 250-smtp.gmail.com at your service, [208.91.198.53]
250-SIZE 35882577
250-8BITMIME
250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-CHUNKING
250 SMTPUTF8
2018-09-11 06:06:46	CLIENT -> SERVER: AUTH LOGIN
2018-09-11 06:06:46	SERVER -> CLIENT: 334 VXNlcm5hbWU6
2018-09-11 06:06:46	CLIENT -> SERVER: ZGlnaXRhbEBsaTIuaW4=
2018-09-11 06:06:46	SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2018-09-11 06:06:46	CLIENT -> SERVER: U2luZ3Nvbmc3MA==
2018-09-11 06:06:46	SERVER -> CLIENT: 534-5.7.14 Please log in via
534-5.7.14 your web browser and then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/answer/78754 l195-v6sm41559981oib.17 - gsmtp
2018-09-11 06:06:46	SMTP ERROR: Password command failed: 534-5.7.14 Please log in via
534-5.7.14 your web browser and then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/answer/78754 l195-v6sm41559981oib.17 - gsmtp
2018-09-11 06:06:46	SMTP Error: Could not authenticate.
2018-09-11 06:06:46	CLIENT -> SERVER: QUIT
2018-09-11 06:06:46	SERVER -> CLIENT: 221 2.0.0 closing connection l195-v6sm41559981oib.17 - gsmtp
2018-09-11 06:06:46	Connection: closed
2018-09-11 06:06:46	SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting