Created attachment 879110 [details]
y2log-NqnRC2.tar.xz

This might be a bug in augeas, or in the usage of augeas:

Type Alt-n a few times, until the timezone selection window appears.

Type Alt-s to open "Other settings ..." window.

Type Alt-n to enter the hostname of the NTP server in the LAN.

Type ntp<space> to overwrite the pre-selected text with the desired hostname.

Type Alt-d to add the just added hostname to the list of remote servers.

Type Alt-e to remove the already selected pool entry from the list.

Type Alt-a to accept all changes and return to timezone selection window.

Type Alt-n to proceed with installation.

At the very end, an error appears that /etc/chrony.conf can not be written.

The same procedure used to work with TW in the past, it works in SLE15-SP7.