Unable to send email (in 2 sites) from yesterday!

Hi,
With no cadges on my two sites, I can’t send emails!
“Bad Credential error” if I try to send est emails:

2020-07-15 08:38:46 Connection: opening to smtp.gmail.com:587, timeout=300, options=array ()
2020-07-15 08:38:46 Connection: opened
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “220 smtp.gmail.com ESMTP u186sm2436779wmu.10 – gsmtp”
2020-07-15 08:38:46 SERVER -> CLIENT: 220 smtp.gmail.com ESMTP u186sm2436779wmu.10 – gsmtp
2020-07-15 08:38:46 CLIENT -> SERVER: EHLO https://www.sicomsys.com
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-SIZE 35882577”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-8BITMIME”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-STARTTLS”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-STARTTLS”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-ENHANCEDSTATUSCODES”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-PIPELINING”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES250-PIPELINING”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-CHUNKING”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250 SMTPUTF8”
2020-07-15 08:38:46 SERVER -> CLIENT: 250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8
2020-07-15 08:38:46 CLIENT -> SERVER: STARTTLS
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “220 2.0.0 Ready to start TLS”
2020-07-15 08:38:46 SERVER -> CLIENT: 220 2.0.0 Ready to start TLS
2020-07-15 08:38:46 CLIENT -> SERVER: EHLO https://www.sicomsys.com
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-SIZE 35882577”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-8BITMIME”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-ENHANCEDSTATUSCODES”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-PIPELINING”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250-CHUNKING”
2020-07-15 08:38:46 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING”
2020-07-15 08:38:46 SMTP -> get_lines(): $str is “250 SMTPUTF8”
2020-07-15 08:38:46 SERVER -> CLIENT: 250-smtp.gmail.com at your service, [2a01:4f9:2b:2fec::2]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8
2020-07-15 08:38:46 Auth method requested: XOAUTH2
2020-07-15 08:38:46 Auth methods available on the server: LOGIN,PLAIN,XOAUTH2,PLAIN-CLIENTTOKEN,OAUTHBEARER,XOAUTH
2020-07-15 08:38:47 CLIENT -> SERVER: AUTH XOAUTH2 dXNlcj1zaWNvbXN5cy53ZWJAZ21haWwuY29tAWF1dGg9QmVhcmVyIAEB
2020-07-15 08:38:47 SMTP -> get_lines(): $data is “”
2020-07-15 08:38:47 SMTP -> get_lines(): $str is “334 eyJzdGF0dXMiOiI0MDAiLCJzY2hlbWVzIjoiQmVhcmVyIiwic2NvcGUiOiJodHRwczovL21haWwuZ29vZ2xlLmNvbS8ifQ==”
2020-07-15 08:38:47 SERVER -> CLIENT: 334 eyJzdGF0dXMiOiI0MDAiLCJzY2hlbWVzIjoiQmVhcmVyIiwic2NvcGUiOiJodHRwczovL21haWwuZ29vZ2xlLmNvbS8ifQ==
2020-07-15 08:38:47 SMTP ERROR: AUTH command failed: 334 eyJzdGF0dXMiOiI0MDAiLCJzY2hlbWVzIjoiQmVhcmVyIiwic2NvcGUiOiJodHRwczovL21haWwuZ29vZ2xlLmNvbS8ifQ==
SMTP Error: Could not authenticate.
2020-07-15 08:38:47 CLIENT -> SERVER: QUIT
2020-07-15 08:38:47 SMTP -> get_lines(): $data is “”
2020-07-15 08:38:47 SMTP -> get_lines(): $str is “535-5.7.8 Username and Password not accepted. Learn more at”
2020-07-15 08:38:47 SMTP -> get_lines(): $data is “535-5.7.8 Username and Password not accepted. Learn more at”
2020-07-15 08:38:47 SMTP -> get_lines(): $str is “535 5.7.8 https://support.google.com/mail/?p=BadCredentials u186sm2436779wmu.10 – gsmtp”
2020-07-15 08:38:47 SERVER -> CLIENT: 535-5.7.8 Username and Password not accepted. Learn more at535 5.7.8 https://support.google.com/mail/?p=BadCredentials u186sm2436779wmu.10 – gsmtp
2020-07-15 08:38:47 SMTP ERROR: QUIT command failed: 535-5.7.8 Username and Password not accepted. Learn more at535 5.7.8 https://support.google.com/mail/?p=BadCredentials u186sm2436779wmu.10 – gsmtp
2020-07-15 08:38:47 Connection: closed
SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

PLEASE HELP ME.