ARK mods break in predictable ways: a mismatch after an update, a stalled Workshop download, or the wrong mod IDs in your config. Here's how to get them downloading and in sync again.
Quick answer
ARK mods stop downloading or updating because of a version mismatch after an update, a stalled Workshop download, or wrong mod IDs in the config. List the Workshop IDs comma-separated with no spaces in your start command, clear the Workshop cache so SteamCMD pulls the mods fresh, and restart the server so server and clients match.
How ARK loads mods
The server downloads Workshop mods via SteamCMD and loads the IDs you list in your launch parameters / GameUserSettings. Both the server and every client must have the same mod version — a mismatch kicks players.
Set the mod IDs correctly
List the Workshop IDs (comma-separated, no spaces) in your start command:
?GameModIds=731604991,895711211
# or on newer setups, the -mods= launch argument:
-mods=731604991,895711211Force a clean re-download
If a mod is stuck or corrupted, clear the Workshop cache and let SteamCMD pull it fresh, then restart the server:
# stop the server first, then remove the cached mod folder
steamapps/workshop/content/346110/<modid>/
# restart — SteamCMD re-downloads it on bootUpdate the server first, then let mods update. Players also need to update those mods in-game — a server/client version gap is the #1 "can't join modded server" cause.
Still stuck?
- Check the mod isn't hidden/removed from the Workshop (it can't download then).
- Make sure there's enough disk space — big mods fail silently when the disk is full.
- Load mods one at a time to find a broken or conflicting one.
Right IDs, a clean cache, and matching versions on server and client — that's 95% of ARK mod problems solved.
ARK mods not downloading because of SteamCMD itself
Sometimes the problem isn't the mod but SteamCMD — a half-finished SteamCMD update, a full disk, or Steam's Workshop servers having a temporary issue for that specific mod. Update SteamCMD itself first, confirm you have free disk space well beyond the mod's listed size, and check the mod's own Workshop page for other users reporting the same download failure before assuming it's your config.
How to prevent ARK mod problems after updates
- Pin a known-good mod list and only add one new mod at a time in testing.
- Keep at least double the mod's listed size free on disk before installing it.
- Subscribe to mod update notifications on Steam so you know before players do.
- Restart the server right after an ARK update rather than waiting — mods often need the fresh binaries to compile and load correctly.
Related ARK guides
If players get a connection timeout rather than a mod mismatch, see ARK joining failed: connection timeout. For a full setup walkthrough, read how to make an ARK server. For mod ideas once things are stable, see best ARK mods.
ARK: Survival Evolved / Ascended is a trademark of Studio Wildcard / Snail Games. Mods are the property of their authors. ESAGAMES is an independent hosting provider, not affiliated with or endorsed by Studio Wildcard.