Hi @CLStl, and welcome!
I recommend you boot with a Live Environment, use it to enter a chroot
environment, from there complete the interrupted update as well as install the now missing dbus-broker
.
How to chroot
-
Ensure youāve got a relatively new ISO or at least one with a still supported LTS kernel.
-
Write/copy/dd
the ISO to a USB thumb drive.
-
When done, boot with the above mentioned USB thumb drive into the live environment.
-
Once booted, open a terminal and enter the following command to enter the chroot
encironment:
manjaro-chroot -a
- If you have more than one Linux installation, select the correct one to use from the list provided.
When done, you should now be in the chroot
environment.
But, be careful, as youāre now in an actual root environment on your computer, so any changes you make will persist after a restart.
From within the chroot
environment, run the following to restart and thus complete the interrupted update:
pamac upgrade && pamac upgrade --aur --devel || echo -e '\033[0;91mThere was an error upgrading the system. AUR packages not upgraded.\e[0m'
This will update your system and ONLY if that was successful update any AUR packages.
a Reminder: While use of the AUR is possible, itās neither recommended nor supported.
I recommend pamac
instead of pacman
, especially for newcomers as pamac
was developed by Manajaro (developers) for Manjaro.
Afterwards, still in thee chroot
environment, install the dbus-broker
package:
pamac install dbus-broker
If it asks you to replace dbus-daemon
, go ahead and do so.
Finally, exist the chroot
environment:
exit
Hold your thumbs, cross your heart, do a little dance, and reboot your PC:
reboot
Hope it helps!
Tip: 
When posting terminal output, copy the output and paste it here, wrapped in three (3) backticks, before AND after the pasted text. Like this:
```
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```
Or three (3) tilde signs, like this:
~~~
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~~~
This will just cause it to be rendered like this:
Sed
sollicitudin dolor
eget nisl elit id
condimentum
arcu erat varius
cursus sem quis eros.
Instead of like this:
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Alternatively, paste the text you wish to format as terminal output, select all pasted text, and click the </> button on the taskbar. This will indent the whole pasted section with one TAB, causing it to render the same way as described above.
Thereby increasing legibility thus making it easier for those trying to provide assistance.
For more information, please see:

Additionally
If your language isnāt English, please prepend any and all terminal commands with LC_ALL=C
. For example:
LC_ALL=C bluetoothctl
This will just cause the terminal output to be in English, making it easier to understand and debug.