MTA:SA fix
CD20: server resource download failed
A file the server sends you could not be downloaded. Connect again first. The line after CD20 tells you which of the other steps applies.
Error downloading requested files
Codes on this page: CD20
Steps
Connect again
Close MTA, open it again and connect once more. On CIT, connect with mtasa://s2.cit.gg:22003: connecting directly also helps when a file failed to download last time.
Source: CIT knowledge base
Try two MTA settings
Press ESC, open Settings, then Advanced. Set Single connection to On and Browser speed to Very slow, then connect again. MTA’s team has suggested both for download trouble.
Source: MTA source code, CIT knowledge base
If the message is about a slow transfer or a timeout
Only when the message says the transfer was slow or timed out.
Pause other big downloads on your connection, then connect again.
Source: cURL error list
If the message says a file could not be written
Only when the message says writing the file failed.
Check that the drive MTA is on has free space, make room, then connect again.
Source: cURL error list, MTA help
If the message says the file is missing or gives a server error
Only when the message names a missing file, a bad address or an HTTP error from the server.
That is on the server’s side. Send the server’s staff the full message and the name of the resource. Reinstalling GTA will not fix it.
Source: cURL error list
Still unclear: try another server
If other servers download fine, report it to the server that fails. If every server fails, take the full message to MTA’s client support.
Careful: Do not delete all downloaded resources or turn off your firewall as a first try.
Source: cURL error list, MTA forum
CD20 alone does not say which of these it is: the line after it does.
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
- CC23 / CD08: connection timed out
- Disconnected by an unknown protocol error
- An in game browser page cannot load
- Server browser is empty or stuck on Loading
- Lag, high ping or packet loss in MTA
- Fatal error or CRC mismatch when joining a server
All fix guides · Every MTA:SA error code · Crash codes and offsets
Where this comes from
Official MTA guidance
- curl.se/libcurl/c/libcurl-errors.html
- wiki.multitheftauto.com/wiki/Error_Codes
- help.multitheftauto.com/sa/trouble/low-disk-space/
- github.com/multitheftauto/mtasa-blue/blob/master/Client/core/CSettings.cpp
- forum.multitheftauto.com/forum/83-client/
Read on 7 September 2026 and written in our own words here.