[Bug] An ERR_GEN_ZLIB_1 error occurs when connecting to the server to load server resources with the game language set to Simplified Chinese

[Tuise233]

Summary

When I connect to a server without any custom maps, everything is normal. However, if I use Alchemist to convert some custom maps and try to connect to the server, the client encounters an ERR_GEN_ZLIB_1 error during the download of server resources, which subsequently leads to the client crashing.
I have tried solutions found online such as "verifying game integrity" and "reinstalling the Rockstar Games Launcher", but the issue persists.

Subsequently, I attempted to convert different custom maps to ensure that the issue was not specific to any particular one. The test confirmed this: regardless of which custom map was used, the problem persisted. Including the FiveM Enhanced gen9 conversion version of bob74_ipl already provided by developers in the community

This issue only occurs when Grand Theft Auto V Enhanced is set to Chinese (Simplified) https://support.rockstargames.com/articles/7iQugdk1wY2PT4x41WwkRL/how-to-change-the-language-in-grand-theft-auto-v

Issue type

Client

Repro rate

Always

Server build version

FXServer-early-access b119 win32

OS

Windows 10 Professional 22H2

CPU

AMD Ryzen 7 9800X3D 8-Core Processor

GPU

NVIDIA GeForce RTX 4080 (16GB GIGABYTE)

RAM

32GB DDR5 4800MHz (16GB + 16GB)

Storage type

SSD NVMe

Connection type

Ethernet

ISP and bandwidth

No response

DxDiag

No response

Network graph

No response

Platform

Windows

OS version / distribution

Windows 10 Professional 22H2

CPU

AMD Ryzen 7 9800X3D 8-Core Processor

RAM

32GB DDR5 4800MHz (16GB + 16GB)

Using txAdmin?

Yes

Hosting provider

Self-hosted

Machine type

None

/perf endpoint output

No response

DDoS protection

No

ulimit -n value (Linux only)

No response

Docker Compose file (Docker only)

No response

Steps to Reproduce

1. Set the game's language to Chinese (Simplified)
2. Install maps
3. Join server
4. Crash

Expected Behavior

It should let me into the server and not crash

Actual Behavior

client crashed.

Evidence

Report Code: 5e3748c7-e46b-4387-998b-e4fe0c38a0c6

Additional Context

I have made the following configuration in my server.cfg:

https://gss.cfx-services.net/v1/public/pool-size-limits/fivem_enhanced

increase_pool_size "AnimStore" 50000
increase_pool_size "CWeaponComponentInfo" 2048
increase_pool_size "Decorator" 900
increase_pool_size "DrawableStore" 50000
increase_pool_size "Dummy Object" 5000
increase_pool_size "DwdStore" 5000
increase_pool_size "FragmentStore" 30000
increase_pool_size "InteriorInst" 450
increase_pool_size "InteriorProxy" 10000
increase_pool_size "MapDataStore" 5000
increase_pool_size "MapTypesStore" 10000
increase_pool_size "MaxBaseModelInfos" 1000
increase_pool_size "MaxCompEntityModelInfos" 1000
increase_pool_size "MaxExtraPedModelInfos" 1000
increase_pool_size "MaxExtraVehicleModelInfos" 1000
increase_pool_size "MaxExtraWeaponModelInfos" 1000
increase_pool_size "MaxMloInstances" 1000
increase_pool_size "MaxMloModelInfos" 1000
increase_pool_size "MaxPedModelInfos" 1000
increase_pool_size "MaxTimeModelInfos" 1000
increase_pool_size "MaxVehicleModelInfos" 1000
increase_pool_size "MaxWeaponModelInfos" 1000
increase_pool_size "MetaDataStore" 2850
increase_pool_size "NavMeshes" 5000
increase_pool_size "StaticBounds" 10000
increase_pool_size "TxdStore" 50000
increase_pool_size "atDScriptObjectNode" 2000
increase_pool_size "fwDynamicArchetypeComponent" 50000
increase_pool_size "ropeData" 100

[Tuise233]

During normal gameplay (without loading any custom maps), if I attempt to noclip quickly or teleport to a distant player (for example, using the /tpm command built into QBox Framework to teleport from the airport in the south to Sandy Shores), there will be an issue with the map losing focus (low LOD), or similarly, an ERR_GEN_ZLIB_1 error will occur

[Tuise233]

Once again, I report that this issue seems to occur only when I switch the language version of GTAV Enhanced to Simplified Chinese (I have not tested other languages). When I switch the language version of GTAV Enhanced to English, all the issues I described above will not occur

[Gogsi]

Hey, that's an interesting find. Simplified Chinese also caused issues in FiveM Legacy that had to be fixed here citizenfx/fivem@ecc907c

Perhaps a similar fix is needed in FiveM for GTAV Enhanced.

I also edited your post to add this information in the title and text.

[Tuise233]

Thank you for your improvements. This is my first time reporting an issue on GitHub. If there are any inadequacies in the description, please bear with them

[nanyan5420]

This issue has nothing to do with Alchemist. ERR_GEN_ZLIB_1‑zlib failure triggers whenever any custom model is loaded onto the server. The only temporary workaround for Steam GTA users is switching your game language away from Chinese. This is not a long‑term fix and is unfriendly to Chinese‑region players.

[Gogsi]

Hello,
A fix for this issue has been implemented in November 11 patch for FiveM for GTAV Enhanced. Please try again and let us know if the issue persists. Thanks for your help!