After install in cPanel 66.0.23 its giving me a blank page

[ariyes]

Hi

I am using this plugin since 2012. Its a awesome and helpful plugin. But recently I installed it on my new cPanel server, now its giving me a Blank Page. So i check the error log and found this:

# tail -f /usr/local/cpanel/logs/error_log

Server Error from 127.0.0.1: HTTP/1.1 403 Forbidden Access denied
[2017-09-20 15:38:27 -0400] warn [whostmgrd] The subprocess (/usr/local/cpanel/whostmgr/docroot/cgi/addons/ipmanager/index.cgi) exited with an error: The subprocess reported error number 255 when it ended. at /usr/local/cpanel/Cpanel/Server/Handlers/SubProcess.pm line 239.
	Cpanel::Server::Handlers::SubProcess::_report_subprocess_errors(Cpanel::Server::Handlers::SubProcess=HASH(0x3394c88)) called at /usr/local/cpanel/Cpanel/Server/Handlers/SubProcess.pm line 97
	Cpanel::Server::Handlers::SubProcess::handler(Cpanel::Server::Handlers::SubProcess=HASH(0x3394c88), __CPANEL_HIDDEN__, __CPANEL_HIDDEN__..., __CPANEL_HIDDEN__, IO::Handle=GLOB(0x3395520), __CPANEL_HIDDEN__, GLOB(0x3395730)) called at cpsrvd.pl line 6487
	cpanel::cpsrvd::cgiHandler(__CPANEL_HIDDEN__, __CPANEL_HIDDEN__, __CPANEL_HIDDEN__, __CPANEL_HIDDEN__) called at cpsrvd.pl line 5957
	cpanel::cpsrvd::dodoc_whostmgrd() called at cpsrvd.pl line 1642
	cpanel::cpsrvd::dodoc(HASH(0x1343050)) called at cpsrvd.pl line 1424
	cpanel::cpsrvd::handle_one_connection(7) called at cpsrvd.pl line 873
	cpanel::cpsrvd::script() called at cpsrvd.pl line 321

Do you have any suggestion how can i fix the blank page?

Your help is appreciated.

Regards
Kayes

[vktechnology]

WHM > Tweak Settings > Security and active "Allow deprecated WHM accesshash authentication"