MTA:SA launcher code
MTA:SA error CL01
An installation step failed while MTA was setting itself up.
How to fix it
Start MTA again and press OK
Start MTA again. When MTA needs Administrator access, it shows a box with the name of the task and says to confirm in the next window. Read which task it names, then press OK.
Source: MTA source code
Select Yes in the Windows window
Windows then shows its own window (User Account Control) and asks if you allow the change. Select Yes. Then the task runs with administrator rights.
Windows asks for an administrator account
Only if Windows asks for an administrator's sign-in details instead of showing Yes.
Your Windows account is a standard account. Windows asks for the user name and password of an administrator account on this PC. Enter them to allow the task.
Source: Microsoft
Patching still fails
Only if the task was Patch GTA:SA and, after you confirmed, MTA says patching GTA:SA has failed.
Use the fix for 'patching GTA:SA has failed'.
MTA:SA cannot launch because patching GTA:SA has failed →
Source: MTA source code
These are the steps of the guide CL01: MTA:SA could not complete the following task (Administrator access).
Still not fixed? Copy the whole message, not only the code, and check your log in the Fix tool. It is read on your own computer.
About this code
CL codes come from MTA's launcher, before the game starts: installing an update, finding GTA, loading MTA's own files or starting gta_sa.exe. MTA's own documentation gives CL01 as Installation task failed.
All fix guides · Every MTA:SA error code · Crash codes and offsets
Where this comes from
- github.com/multitheftauto/mtasa-blue/blob/master/Client/loader/CInstallManager.cpp
- learn.microsoft.com/en-us/windows/security/application-security/application-control/user-account
- learn.microsoft.com/en-us/windows/security/application-security/application-control/user-account
Read on 23 October 2026 and written in our own words here.