Internal Server Error 500: No response from subprocess (whostmgr (whostmgr10)) ...

Dear Support Team, after i made the update from WHM, now i get following Error once i am logging in to WHM as root: [QUOTE]Internal Server Error
[QUOTE]
[QUOTE] 500 No response from subprocess (whostmgr (whostmgr10)): The subprocess reported error number 72,057,594,037,927,935 when it ended. The process dumped a core file.
Once i try to get the logs: [QUOTE][root@srv01 ~]# tail -f /usr/local/cpanel/logs/error_log tail: cannot open "/usr/local/cpanel/logs/error_log" for reading: No such file or directory tail: no files remaining
I have also made: [QUOTE][root@srv01 ~]# /scripts/upcp --force
and also: [QUOTE]/usr/local/cpanel/scripts/autorepair autorepair
But without any success. I still get the Error. Please Note: I am not able to raise a support ticket, because i am not able to get out the Support Access ID: [QUOTE][root@srv01 ~]# /usr/local/cpanel/cpanel -S [root@srv01 ~]#
Here are the OS and WHM Versions: [QUOTE][root@srv01 ~]# /usr/local/cpanel/cpanel -V [root@srv01 ~]# cat /usr/local/cpanel/version 11.86.0.12
[QUOTE][root@srv01 ~]# lsb_release -d Description: CentOS Linux release 7.7.1908 (Core)