Installation of Jetson TX-2 using SDK-Manager, 404 when fetching qemu

Hi,
I am trying to flash a Jetson TX-2 with the SDK-manager (on an Ubuntu 18.04 system), but unfortunately it always fails with the following error:

11:16:26 INFO : File System and OS : Err:1 http://se.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 qemu-user-static amd64 1:2.11+dfsg-1ubuntu7.21
11:16:26 INFO : File System and OS : 404 Not Found [IP: 194.71.11.173 80]
11:16:26 ERROR : File System and OS : E:
11:16:26 ERROR : File System and OS : Failed to fetch http://se.archive.ubuntu.com/ubuntu/pool/universe/q/qemu/qemu-user-static_2.11+dfsg-1ubuntu7.21_amd64.deb 404 Not Found [IP: 194.71.11.173 80]
11:16:26 INFO : File System and OS : E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
11:16:26 INFO : File System and OS : exit status 100
11:16:26 INFO : File System and OS : [ Package PreInstall Finished with Error ]
11:16:26 INFO : File System and OS : [ 1.14 MB used. Disk Avail: 22.50 GB ]
11:16:26 INFO : File System and OS : [ NV_L4T_FILE_SYSTEM_AND_OS_T186_COMP Install took 1s ]
11:16:26 ERROR : File System and OS : Run commands failed at step PreInstall: command sudo apt-get install -y qemu-user-static finished with error
11:16:26 INFO : File System and OS :
11:16:26 ERROR : File System and OS : command terminated with error
11:16:26 ERROR : File System and OS : install ‘File System and OS’ failure

I tried to install qemu manually but that didn’t work either.
Is there another way round, maybe installing the TX-2 without the SDK-Manager?
Thanks in advance for your help.

UPDATE: installed qemu from source, but the problem remains.
UPDATE 2: I think this should be http://se.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 qemu-user-static amd64 1:2.11+dfsg-1ubuntu7.23

UPDATE 3: Manually installing http://se.archive.ubuntu.com/ubuntu/pool/universe/q/qemu/qemu-user-static_2.11+dfsg-1ubuntu7.23_amd64.deb solved the issue

Run this, and then see if it works after:

sudo apt update
sudo apt --fix-broken install
sudo apt-get install libgconf-2-4 libcanberra-gtk-module
sudo apt-get install python

Thanks. Already solved it by manually downloading and installing the correct archive though.
But will keep it in mind if I should run into similar problems in the future.