cpanel update failure due to python issues

[andrebm]

when trying to update cpanel i got this error
[2017-11-23 09:40:06 +0100] Switching to version '11.66.0.34' of updatenow to perform sync.
[2017-11-23 09:40:06 +0100] checkyum version 22.3
[2017-11-23 09:40:07 +0100] checkyum version 22.3
[2017-11-23 09:40:08 +0100] E There was a problem importing one of the Python modules
[2017-11-23 09:40:08 +0100] E (XID 4rukmu) The system failed to execute yum with the arguments “--assumeyes --config /etc/yum.conf install ncurses-term” because of an error: The “/usr/bin/yum” command (process 191070) reported error number 1 when it ended. : There was a problem importing one of the Python modules
[2017-11-23 09:40:08 +0100] required to run yum. The error leading to this problem was:
[2017-11-23 09:40:08 +0100] /lib64/libcurl.so.4: undefined symbol: nghttp2_session_callbacks_set_error_callback
[2017-11-23 09:40:08 +0100] Please install a package which provides this module, or
[2017-11-23 09:40:08 +0100] verify that the module is installed correctly.
[2017-11-23 09:40:08 +0100] It's possible that the above module doesn't match the
[2017-11-23 09:40:08 +0100] current version of Python, which is:
[2017-11-23 09:40:08 +0100] 2.7.5 (default, Oct 2 2016, 09:18:54)
[2017-11-23 09:40:08 +0100] [GCC 4.8.5 20150623 (Red Hat 4.8.5-9)]
[2017-11-23 09:40:08 +0100] If you cannot solve this problem yourself, please go to
[2017-11-23 09:40:08 +0100] the yum faq at:
[2017-11-23 09:40:08 +0100] http://yum.baseurl.org/wiki/Faq
[2017-11-23 09:40:08 +0100]
[2017-11-23 09:40:08 +0100] checkyum version 22.3
[2017-11-23 09:40:09 +0100] E Sysup: Needed system RPMs were not installed: ncurses-term
[2017-11-23 09:40:09 +0100] ***** FATAL: Cannot proceed. Needed system RPMs were not installed.

[avij]

You seem to be using a curl version that is not provided by CentOS but by CPanel. Please ask them for assistance.

[andrebm]

how to use a curl provided by centos?

[avij]

That in turn has a chance of breaking your system, because something on your system depends on the non-CentOS version of curl.

When you (or your ISP) installed CPanel, it changed a number of CentOS packages to CPanel packages. It could be said that you are no longer running CentOS. Any advice to rectify the situation we might give here might break your system further. Therefore: please ask for assistance from the CPanel folks. They have their own support venues.