Xperia X hangs on boot after upgrade to [4.3.0.12]

So I followed this instruction to get internet:
Internet in recovery
which seemed to work (first, i used a classic local IP, forgot that I am in telnet):

/ # echo “nameserver 8.8.8.8” >> /etc/resolv.conf
/ # route add default gw 192.168.xxx.xxx
SIOCADDRT: Network is unreachable
/ # route add default gw 10.42.66.67

and when trying to update / get new packages this was my output after roughly 20 minutes:

/ # version --dup
REFRESHING CACHE AND DOWNLOADING PACKAGES

So it does not seem that there is anything happening. Am I still making any mistakes?

Edit
I found my mistake:

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

should be for my case

iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE

So now I can reach the internet and get ping replies. Nonetheless I still have the problem, that the update process hangs at

version --dup
REFRESHING CACHE AND DOWNLOADING PACKAGES

So I tried to get a clue following this post:

zypper ref
Repository ‘adaptation-common’ is up to date.
Problem retrieving files from ‘adaptation0’.
Store credentials not received. Not connected to D-Bus server
Please see the above error message for a hint.
Skipping repository ‘adaptation0’ because of the above error.
Problem retrieving files from ‘aliendalvik’.
Store credentials not received. Not connected to D-Bus server
Please see the above error message for a hint.
Skipping repository ‘aliendalvik’ because of the above error.
Repository ‘apps’ is up to date.
Repository ‘compat-f5321’ is up to date.
Repository ‘customer-jolla’ is up to date.
Repository ‘hotfixes’ is up to date.
Repository ‘jolla’ is up to date.
Repository ‘openrepos-JulienBlanc’ is up to date.
Repository ‘openrepos-ade’ is up to date.
Repository ‘openrepos-birdzhang’ is up to date.
Repository ‘openrepos-direc85’ is up to date.
Repository ‘openrepos-osetr’ is up to date.
Repository ‘openrepos-planetos’ is up to date.
Repository ‘openrepos-planetos_store’ is up to date.
Repository ‘openrepos-rinigus’ is up to date.
Repository ‘openrepos-rubdos’ is up to date.
Repository ‘openrepos-tpLabs’ is up to date.
Problem retrieving files from ‘sailfish-eas’.
Store credentials not received. Not connected to D-Bus server
Please see the above error message for a hint.
Skipping repository ‘sailfish-eas’ because of the above error.
Retrieving repository ‘store’ metadata …[error]
Repository ‘store’ is invalid.
[store|plugin:ssu?repo=store] Valid metadata not found at specified URL
History:
– Unknown error reading from ‘plugin:ssu?repo=store’
– Store credentials not received. Not connected to D-Bus server
Please check if the URIs defined for this repository are pointing to a valid repository.
Skipping repository ‘store’ because of the above error.
Problem retrieving files from ‘xt9’.
Store credentials not received. Not connected to D-Bus server
Please see the above error message for a hint.
Skipping repository ‘xt9’ because of the above error.
Some of the repositories have not been refreshed because of an error.

So there seems to be a general problem with the store (authentification)? How do I fix this?