Palworld 1.0 Crashes, Save Loss, and Server Errors: Every Verified Fix

Bottom line

Evidence status

Step zero: confirm you are on v1.0.1

Pocketpair shipped the v1.0.1 hotfix on July 15, five days after the 1.0 release. If you or your host are still on the launch build, several of the problems people search for are already fixed upstream.

• v1.0.1 fixes save data being unintentionally discarded after certain operations, the single worst 1.0 bug.
• It also fixes the Burning status continuing after touching a Campfire, a PlayStation-only repeated save error at the title screen, and an Xbox-only freeze of around 30 seconds after fast travel.
• The build is labeled 1.100.619 on consoles and storefronts.
• Dedicated servers must be updated separately from clients; a rented server stays on the old version until the host updates its image.
• If a problem started before July 15 and you have since updated, retest before applying any other fix in this guide.

Crash at launch: old mods are the first suspect

1.0 changed enough of the game's internals that Early Access mods are broadly incompatible, and Pocketpair's own guidance is that they must be removed, not disabled. The common PC crash signature is a UE-Pal Exception Access Violation.

• Delete pre-1.0 mods and the mod loader's files from the game directory entirely. A disabled mod still leaves files that 1.0 can load and crash on.
• After removing mods, verify game files: Steam, right-click Palworld, Properties, Installed Files, Verify integrity of game files.
• If the crash continues on a clean install, update the GPU driver and retest once before changing multiple settings at the same time.
• A black screen at launch with no crash dialog points at a corrupted config; renaming the config folder so the game regenerates it is the community-verified reset, and it costs you only local settings.
• Crashing mid-session at high player counts on a server you joined is more likely the server-side memory problem below than your PC.
• Report your crash on the FrameReady tracker so the count and platform spread are visible to everyone.

Session Not Found and failed joins

Join errors spiked with 1.0 because the player wave and the patch wave arrived together. The error is almost never on your network; it is a version or configuration mismatch.

• Match versions first. Client updates arrive automatically; dedicated servers do not. Rented hosts must roll the new server image before you can join.
• If a friend cannot join a co-op world, check the world's Multiplayer toggle; worlds created solo default to multiplayer off.
• A server that was fine yesterday and rejects everyone today usually has a stale session: fully restart the server process, not just the game.
• If the error names an incompatible version after you updated, verify game files so a partial update is not the cause.
• Password mismatches and full servers produce different messages; Session Not Found specifically points at the version, toggle, or stale-session cases.

Dedicated server RAM climbs until it crashes

Server hosts consistently describe the same pattern since 1.0: memory allocation grows over hours and is never fully released, then the server dies at peak. Pocketpair optimized server-side processing in 1.0 but has not confirmed a specific leak, so treat mitigation as the plan rather than waiting for a patch date.

• Schedule automatic restarts. Community hosts commonly run every 4 to 12 hours, timed for the quietest hour of your player base.
• Size RAM with headroom, not at the minimum. Growth-then-crash behavior means the gap between baseline and ceiling is what buys uptime between restarts.
• Use the FrameReady Palworld server RAM calculator to get an honest baseline for your player count, then add the headroom on top.
• Base size matters: sprawling bases with hundreds of Pals raise baseline memory before any leak-like growth starts.
• If your host offers it, enable automatic crash restarts so a 4 a.m. failure does not hold the server down all night.

Moving a co-op world to a dedicated server: read this first

The 1.0 player wave has many groups outgrowing four-player co-op and migrating to dedicated servers. The world and bases transfer; the known trap is that a player's character and inventory can fail to appear on the other side, reported as a player-ID mismatch between save formats.

• Back up the entire save folder before you migrate anything. This is the one step that makes every failure below recoverable.
• Expect the world and bases to arrive; the character-level data is what goes missing when the GUID mismatch bites.
• Community repair steps exist that rewrite the player ID inside the save. They work for many people but edit save files directly; never run them on your only copy.
• If a migration went wrong and you have the backup, you can always return to the co-op save and retry.
• Report migration failures on the tracker so the scale of the problem is documented.

FAQ

Direct answers for the searches players are running this week.

• Q: Did Palworld 1.0 delete my save? A: A real bug could discard save data after certain operations; v1.0.1 fixed it on July 15. Update first, restart once, and check the load menu before concluding the save is gone.
• Q: Why does Palworld crash at launch after 1.0? A: Leftover Early Access mods are the most common verified cause; delete them and their loader completely, then verify game files. The UE-Pal Exception Access Violation on PC usually traces to this.
• Q: What does Session Not Found mean? A: The server you are joining does not match your client version, has multiplayer off for that world, or is holding a stale session that a full restart clears.
• Q: Is the dedicated server memory leak confirmed? A: Pocketpair has not confirmed a specific leak. The growth-until-crash pattern is consistently reported by hosts, and scheduled restarts plus RAM headroom are the working mitigation.
• Q: Is it safe to update to v1.0.1? A: Yes. It is a stability hotfix with no content changes, and it fixes the save-loss bug; there is no verified reason to hold back.

Related next steps

Sources

• official: Pocketpair Palworld announcements on Steam. The 1.0 release notes, the mod-removal warning, and the v1.0.1 hotfix notes with the save-loss fix.
• inferred: Game8: Palworld 1.0 crash troubleshooting. The UE-Pal exception signature, config-reset step, and mod-purge verification.
• inferred: Steam discussion: dedicated server version mismatch. Player reports establishing version mismatch as a Session Not Found cause.
• inferred: Server host guide: 1.0 RAM growth and join errors. The memory-growth pattern, restart mitigation, and the co-op migration GUID mismatch.