Can someone help me with this error

[mcninja]

Anytime i try and open terraria single player terraria closes out and an error appears saying:

System.Io.IOException: The cloud file provider is not running

Is there any way i can fix this?

[th]

1) Don't play in Steam's offline mode.
2) Don't play without being connected to Internet.

Now, when you've done both things above you need to switch all your saves to your local disk instead of Steam's cloud storage. To do that:
1) Go to your Terraria's right click menu in the Steam's library.
2) Turn ON your Steam's cloud feature for Terraria if it was off by chance.
3) Run Terraria.
4) On the every player and every world on the screens where you choose them there will be such small button which has two modes - cloud or local storage. Use it to switch every save-file to your local storage.
5) Exit Terraria and go the same place as in 1st step.
6) Turn OFF your Steam's cloud feature for Terraria and never use it anymore.

The explanation is that Steam's Terraria cloud feature is broken. People complain that sometimes saves got corrupted or lost. So keep your saves local at any time.

If by chance at step 4 you'll get the error - just w8 a little and repeat. Should work at some point.

If it doesn't then turn off the cloud feature as described and may be reinstall the game. And you will have to sacrifice all your saves and start over.

[th]

You may also try to manually download your save-files from the cloud using this link:
https://store.steampowered.com/account/remotestorageapp/?appid=105600
In that case you have a chance to avoid their sacrifice.