Uncaught Exception: Serialization of 'Closure' is not allowed

[Ankita Biswas]

Hello All, 

Hope you all are doing well.

I am facing this issue in online payment methods when redirecting to third party gateway.

<b>Fatal error</b>:  Uncaught Exception: Serialization of 'Closure' is not allowed in /app/vendor/magento/framework/Session/SessionManager.php:151
Stack trace:
#0 /app/vendor/magento/framework/Session/SessionManager.php(151): session_write_close()
#1 [internal function]: Magento\Framework\Session\SessionManager-&gt;writeClose()
#2 {main}
  thrown in <b>/app/vendor/magento/framework/Session/SessionManager.php</b> on line <b>151</b><br />

 
I have debug this by creating logs and session values are maintained during redirection. Unable to find the root cause.
I am using magento 2.3.

Can anyone please suggest?

Your help will be really appreciated.

Thanks