TT-RSS and Shaarli not accesible after upgrade to 22.19

After the recent upgrade, my FreedomBox (testing) had Shaarli and TT-RSS disabled. I was able to toggle Shaarli on from the UI, but not TT-RSS. Its systemd unit is “masked”.

Warning: The unit file, source configuration file or drop-ins of tt-rss.service changed on disk. Run 'systemctl daemon-reload' to reload units.
○ tt-rss.service
     Loaded: masked (Reason: Unit tt-rss.service is masked.)
    Drop-In: /usr/lib/systemd/system/tt-rss.service.d
     Active: inactive (dead)

Update: Shaarli appears to be enabled, but accessing the app returns a 404 response (same as TT-RSS).

Can be the solution: [SOLVED] Error installing wireguard - Pioneer Support - FreedomBox Forum

I can get the tt-rss service to start by doing an unmask, but the application only returns 404 responses.

TT-RSS and Shaarli were uninstalled by unattended-upgrades. I was able to get them back by running the following command as root.

DEBIAN_FRONTEND=noninteractive apt install tt-rss shaarli

Link to issue on the bug tracker: 2265