[Freedombox-discuss] Matrix-synapse fails to start, requires python3-authlib that's not available.

[A. F. Cano]

Matrix synapse has been failing to start for a while.

Jun 16 13:46:58 fbx systemd[1]: matrix-synapse.service: Scheduled restart job, restart counter is at 80625.
Jun 16 13:46:58 fbx systemd[1]: Starting matrix-synapse.service - Synapse Matrix homeserver...
Jun 16 13:47:10 fbx python3[2143661]: Synapse 1.152.1 needs authlib>=1.6.11; extra == "oidc", but got authlib==1.6.0
Jun 16 13:47:10 fbx python3[2143661]: Synapse 1.152.1 needs authlib>=1.6.11; extra == "all", but got authlib==1.6.0
Jun 16 13:47:10 fbx python3[2143661]: Missing Requirements: authlib, authlib
Jun 16 13:47:10 fbx python3[2143661]: To install run:
Jun 16 13:47:10 fbx python3[2143661]:     sudo apt install python3-authlib python3-authlib

The dependencies of matrix-synapse, according to aptitude say:

Suggests: python3-authlib (>= 0.15.1)

However this seems like a dependency, not just a suggestion.

The installed python3-authlib is 1.6.0-1+deb13u1, but aptitude says:

Versions of python3-authlib (2)
i	1.6.0-1+deb13u1
p	1.7.2-1

but the latter version seems not available.  No amount of attemps to install
it succeed.

What should I do about this?  Why is 1.7.2-1 listed but apparently not
available? How to make it available?

Thanks.