Update Preferences not loading

Hello cPanel users/administrator,

I have a problem with the Update Preferences in WHM in my account. I've tried to update it once before and since then I cant open it anymore. Everything else works fine except the update preferences. See screenshot what kind if faultcode it gives after a long time waiting.

Do you guys know how to fix this?

Thank you in advance,
Haci

 

I've tried to (force)update cPanel and I get the following mail:

Code:

cPanel & WHM update failure in upcp script
Update log preview:
----------------------------------------------------------------------------------------------------
=> Log opened from cPanel Update (upcp) - Slave (19233) at Sat May 20 16:54:21 2017
[2017-05-20 16:54:21 +0200] Detected cron=0 (--force passed on command line)
[2017-05-20 16:54:21 +0200] 1% complete
[2017-05-20 16:54:21 +0200] Running Standardized hooks
[2017-05-20 16:54:21 +0200] 2% complete
[2017-05-20 16:54:21 +0200] mtime on upcp is 1480442229 (Tue Nov 29 18:57:09 2016)
----------------------------------------------------------------------------------------------------
=> Log opened from /usr/local/cpanel/scripts/updatenow (19235) at Sat May 20 16:54:21 2017
[2017-05-20 16:54:21 +0200] Detected version '11.60.0.26' from version file.
[2017-05-20 16:54:21 +0200] Running version '11.60.0.26' of updatenow.
[2017-05-20 16:54:21 +0200] --force passed on command line. Upgrade will disregard update config settings.
[2017-05-20 16:54:21 +0200] W version explicitly hardcoded to CPANEL=11.60.0.26 in /etc/cpupdate.conf
[2017-05-20 16:54:21 +0200] Using mirror '10.215.217.19' for host 'branch-build.dev.cpanel.net'.
[2017-05-20 16:55:49 +0200] ***** FATAL: Unable to retrieve tier version info: Failed to download URL 'http://branch-build.dev.cpanel.net/cpanelsync/TIERS.asc'.
[2017-05-20 16:55:49 +0200] The Administrator will be notified to review this output when this script completes
=> Log closed Sat May 20 16:55:49 2017
[2017-05-20 16:55:49 +0200] 17% complete
[2017-05-20 16:55:49 +0200] E Running `/usr/local/cpanel/scripts/updatenow --upcp --log=/var/cpanel/updatelogs/update.1495292061.log --force` failed, exited with code 255 (signal = 0)