Showing this error my website

I have opencart website. When checking server error this all error showing there. My website url is www.yamdeal.com
Plz anyone help me why showing this error and how fix it.



thrown in /home/aqlixurp/public_html/system/library/db/mysqli.php on line 40
#2 /home/aqlixurp/public_html/system/library/session.php(81): Session\DB->write('b589c4851d170f1...', Array)
#1 /home/aqlixurp/public_html/system/library/session/db.php(32): DB->query('REPLACE INTO `o...')
#0 /home/aqlixurp/ocartdata/storage/modification/system/library/db.php(58): DB\MySQLi->query('REPLACE INTO `o...')
2020-12-08 13:49:59.422407 [NOTICE] [4019772] [45.124.7.114:49727:HTTP2-33#APVH_yamdeal.com:443] [STDERR] PHP Fatal error: Uncaught Exception: Error: MySQL server has gone away<br />Error No: 2006<br />REPLACE INTO `ock0_session` SET session_id = 'b589c4851d170f1753bcf22e82', `data` = '{\"user_id\":\"2\",\"user_token\":\"sY1DjNsGclCNT6lDq2hy8Yfxjyc0O5RU\",\"language\":\"en-gb\",\"currency\":\"INR\"}', expire = '2020-12-08 08:43:59' in /home/aqlixurp/public_html/system/library/db/mysqli.php:40

Fatal error: Uncaught Exception: Error: MySQL server has gone away

Contact your host to resolve this issue.

Hello,

PM sent please check.

Regards!
Seth

Hi there,

We should be able to help with this, would you be able to drop us an email to get an estimate?

Email Me : carter@cisinlabs.com

Kind regards,
Carter W

Hello There,

I will help you out with this work.
Please get connected to discuss further.

Regards
Linnea
E- linneajones.mil@gmail.com