I get a black screen when launching the Map Editor
Usually this is caused due to incorrect installation of Map Editor resources. If you are using a stable MTASA client, please install it again and make sure that you use Client and Server install option.
If you are using a nightly build, to get it working right you need to download latest resources (step 3), unpack the archive and put its contents in: MTA San Andreas\server\mods\deathmatch\resources , where MTA San Andreas is a folder where you've installed MTA San Andreas (default location: C:\Program Files\MTA San Andreas).
Putting them in this path: MTA San Andreas\mods\deathmatch\resources is a common mistake - it won't work if you put them there. So make sure to put them in the italic path above.
If this issue still occurs, even when you've checked the note above and verified that you've installed it correctly, it might be because you've got an outdated acl.xml file. You can download the default one here. It should be placed in server/mods/deathmatch/ in your MTA: San Andreas installation directory.
Source(s): https://wiki.multitheftauto.com/wiki/Res ... Map_Editor