MTA:SA fix
CL01: MTA:SA could not complete the following task (Administrator access)
MTA needed Administrator access for a task, such as Patch GTA:SA, and did not get it. Start MTA again, press OK, and allow the change in the Windows window.
MTA:SA could not complete the following task:
MTA:SA needs Administrator access for the following task:
Please confirm in the next window.
Codes on this page: CL01
Steps
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
See also: MTA:SA cannot launch because patching GTA:SA has failed, CL02: MTA cannot copy update files, CL22: MTA could not start GTA:SA
The CL01 box names, between quote marks, the task MTA could not finish, for example 'Install updated MTA:SA files' or 'Patch GTA:SA'.
Microsoft says that if you do not approve the change in the Windows window, the action is not done. MTA shows CL01 when its task with Administrator access could not be started.
For the GTA:SA check, after you confirm, MTA tries the check again.
CIT's knowledge base also says that for some tasks MTA asks for Administrator access and says to confirm in the next window.
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.
Other problems like this
- CL33: Main file has an incorrect name
- Sorry, game not found: MTA cannot find GTA San Andreas
- Antivirus says MTA is a virus, or GTA:SA executable is incorrect or missing
- CL29: client integrity warning at launch
- Another MTA or GTA instance is already running
- MTA data files or core.dll are missing
All fix guides · Every MTA:SA error code · Crash codes and offsets
Where this comes from
MTA source code and Microsoft Learn (User Account Control)
- 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.