[j-nsp] MX204 update from 21.4R3-S4 to 21.4R3-S5

[Andreas S. Kerber]

Anybody successfully updated MX204 from 21.4R3-S4 to 21.4R3-S5?
Got a few MX204 and trying to "request vmhost software add" fails
on each of them.

Anybody got a hint for me?

$ request vmhost software add /var/tmp/junos-vmhost-install-mx-x86-64-21.4R3-S5.4.tgz
Junos Validation begin. Procedure will take few minutes.
Checking if VirtFS can be used for image install ...
Required: 7654536554 bytes Available: 21476761600 bytes
Using VirtFS ...
{...}
Hardware Database regeneration succeeded
Validating against /config/juniper.conf.gz
mgd: commit complete
Validation succeeded
Validating against /config/rescue.conf.gz
mgd: commit complete
Validation succeeded
Verified junos-vmhost-install-mx-x86-64-21.4R3-S5.4 signed by PackageDevelopmentECP256_2023 method ECDSA256+SHA256
Copied the config and other data to the aux disk.
Transfer junos-host-upgrade.sh
lost connection
Transfer Done
Starting upgrade ...
sh: /junos/install/junos-host-upgrade.sh: No such file or directory
rm: cannot remove '/junos/install/junos-host-upgrade.sh': No such file or directory
... upgrade failed.