The FiveM modded-game may fail to load Citizengame.DLL mainly due to the following factors, although there can be other reasons as well:
Delete the Caches File from the FiveM Directory
FiveM may show the ‘Could Not Load Citizengame’ error if the cache file of FiveM is corrupt. Here, deleting the Caches file may solve the problem.
Edit the CitizenFX.INI File
If the FiveM installation “thinks” that the OS of your device is not supported or compatible with it, it may throw the Citizengame.DLL error. In this context, editing the CitizenFX.INI file to disable the OS version check may solve the problem.
Re-Install Visual C++ Redistributable for Visual Studio 2015
This error may also come up if the installation of Visual C++ Redistributable for Visual Studio 2015 is corrupt as it is essential for the operation of FiveM. In such a case, reinstalling the mentioned Visual C++ distribution may solve the FiveM problem.
Disable or Uninstall the Security Product of Your System
FiveM game might show the Citizengame error if the firewall or antivirus of your system is hindering the execution of the game modules. In such a scenario, disabling your antivirus or firewall may solve the FiveM issue at hand. Warning: Proceed at your own risk as disabling antivirus/firewall or editing any of their settings can expose your system to threats. Before proceeding, make sure to exclude the EXE file of FiveM and its relevant folders in the settings of antivirus and firewall.
Verify Integrity of Game Files of GTA
If the essential files of GTA have become corrupt, then you will encounter the issue at hand. In this case, verifying the integrity of the GTA files may solve the problem.
Reinstall FiveM and GTA
If some of the essential FiveM files are deleted (most probably by the antivirus), then this corrupt installation may throw an error message. In this context, reinstalling the FiveM and GTA may solve the problem. If the issue persists, then you may perform a clean installation of the OS of your device.
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