A fatal error or timeout occurred while processing this directive

After upgraded to WHM 11.46.

Not able to create new account, no able to go WHM basic configuration, not able to use Account function.
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Users also reported not seeing their databases. Any solution to this?

Code:

-------------------------------------------------------------------------
A fatal error or timeout occurred while processing this directive.
Can't use an undefined value as a HASH reference at /usr/local/cpanel/Cpanel/NAT/Object.pm line 54.
 at /usr/local/cpanel/Cpanel/NAT/Object.pm line 54.
	Cpanel::NAT::Object::load_file(Cpanel::NAT::Object=HASH(0x71930c0)) called at /usr/local/cpanel/Cpanel/NAT/Object.pm line 27
	Cpanel::NAT::Object::new("Cpanel::NAT::Object") called at /usr/local/cpanel/Cpanel/NAT.pm line 20
	Cpanel::NAT::cpnat() called at /usr/local/cpanel/Cpanel/NAT.pm line 29
	Cpanel::NAT::get_public_ip("183.16.24.1") called at whostmgr/bin/whostmgr.pl line 2259
	main::editsets() called at whostmgr/bin/whostmgr.pl line 463
-------------------------------------------------------------------------

CENTOS 6.6 x86_64 WHM 11.46.0 (build 12)

 

Thank you . I have deleted /var/cpanel/cpnat and everything is working correctly now. Thank you for your help!