UPDATE: Looks like the admin has posted for first time this year: https://mstdn.party/@jonah@neat.computer/109813159614617478

⚠️ Warning to anyone on the mstdn.party or mstdn.plus servers, recommend you move to another server ASAP. Their only admin is apparently unreachable, and his accounts haven't posted anything since Dec 2022.

You can find a new server at https://joinmastodon.org/servers or https://fedi.garden (the servers listed there have at least two admins and promise to give 3 months warning of any shutdown).