If you're on bear.community, you have 30 days to export your data and migrate to a new instance.
Bear.community ran over their plan limits in November. Masto.host hasn't been able to reach the admin, @urso, in over a month. That's why they've been down this weekend. Masto.host has kindly agreed to bring the instance back online temporarily, but it will very likely shut down permanently on January 31.
Please let your friends on bear.community know!