There was a problem while sending emails.

I am getting below error, please help me.

Versions:
WordPress: 5.5.1
WordPress MS: No
PHP: 7.1.14
WP Mail SMTP: 2.5.0

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: Could not authenticate.
Host: lindabenn.com
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.0.1e-fips 11 Feb 2013

Debug:
Mailer: Other SMTP
SMTP Error: Could not authenticate.

SMTP Debug:
2020-10-26 15:57:56 Connection: opening to ssl://lindabenn.com:465, timeout=300, options=array()

2020-10-26 15:57:56 Connection: opened

2020-10-26 15:57:56 SERVER -> CLIENT: 220-gator4040.hostgator.com ESMTP Exim 4.93 #2 Mon, 26 Oct 2020 10:57:56 -0500 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.

2020-10-26 15:57:56 CLIENT -> SERVER: EHLO lindabenn.com

2020-10-26 15:57:56 SERVER -> CLIENT: 250-gator4040.hostgator.com Hello lindabenn.com [192.185.34.202]250-SIZE 52428800250-8BITMIME250-PIPELINING250-AUTH PLAIN LOGIN250 HELP

2020-10-26 15:57:56 CLIENT -> SERVER: AUTH LOGIN

2020-10-26 15:57:56 SERVER -> CLIENT: 334 VXNlcm5hbWU6

2020-10-26 15:57:56 CLIENT -> SERVER: [credentials hidden]

2020-10-26 15:57:56 SERVER -> CLIENT: 334 UGFzc3dvcmQ6

2020-10-26 15:57:56 CLIENT -> SERVER: [credentials hidden]

2020-10-26 15:57:58 SERVER -> CLIENT: 535 Incorrect authentication data

2020-10-26 15:57:58 SMTP ERROR: Password command failed: 535 Incorrect authentication data

SMTP Error: Could not authenticate.

2020-10-26 15:57:58 CLIENT -> SERVER: QUIT

2020-10-26 15:57:58 SERVER -> CLIENT: 221 gator4040.hostgator.com closing connection

2020-10-26 15:57:58 Connection: closed

SMTP Error: Could not authenticate.