For the save data since it is in the appdata folder the data would need to be downloaded from the in game client or through a support ticket with the name of the save provided. For the error I would also suggest a ticket as we can look into what could be causing that.

Good afternoon, In the past I have had no issues downloading saves from the server manager onto my desktop.  However, today I've been running into an error that I can't connect to the server API.

=WIPED 2/28=Hells Anomaly |100KStart|Free Helis |Keycards |Hidden Stashes | Weekend Raiding| Quests

Newest and greatest no raiding pvp server! Has vanilla aspect with some mods but not to OP Mods Join today! And start the journey to the horizon!! https://discord.gg/ XZuUrXQxuK

THE OTHER WORLD   🔸️XBOX CHERNARUS 50-SLOT 🔸️LOOT SHACKS  🔸️RAID WEEKENDS 🔸️BUNKERS 🔸️AUTO TRADER 🔸️FACTIONS 🔸️ACHIEVEMENTS 🔸️ACTIVE STAFF 🔸️GREAT COMMUNITY   Discord Link: https://discord.gg/4bmbph2DvN

what do i do if it doesnt come back  

[EU][HUN] TIME TO SURVIVE |Vanilla++|MAGYAR|Weekend raid Discord link: https://discord.gg/ddYNDDHhGb SERVER IP:109.123.108.117:2342

I've seen no discussion on how to transfer a local save from a world you and your friends were already working on to your new server. I hope that my figuring this out will save others some time. The process is quite simple, first you will need to contact support and request full ftp access so that you may remove the files within the servers premade world, in other words you will need to delete the data within the servers default world not the world itself. Once you have done this you may transfer over the data from your desired local save into the servers default world file. You cannot replace the entire worlds folder on the remote site because the server will continue to create and use the default world so all you can do is replace the save data within that folder. There is 1 limitation I have found and that is you cannot transfer over player data from the local world aside from your own, this is because player data is saved server side and not locally so your friends player data will be lost. Hopefully I explained this well enough and it helps.