Affecting Project Zomboid Mods
There’s a widespread issue with Steam itself, not just Project Zomboid. Steam Workshop is currently experiencing problems where:
Mod downloads are stalling or not completing
Subscribed mods are missing or fail to appear ingame
Servers are reporting mismatched mod versions
This is due to Steam’s backend content delivery network (CDN) having disruptions, which is affecting multiple games, not just Zomboid.
Temporary Fixes:
Be patient; Valve is likely addressing it
Avoid resubscribing or purging your mod folder until the issue stabilizes
Keep an eye on Steam/Project Zomboid community channels for updates