Thanks for the advice, I fixed it.

@zlo OK, I went into properties-compatibility and simply unchecked run as administrator, rebooted and now everything works as it should.

During installation, FAF placed a shortcut on my desktop with administrator rights by default, and now it complains that I run this shortcut as an administrator. Did I understand correctly?

Thanks for the advice, I fixed it.

@magge Just now I noticed that if you run Supreme Commander through Steam and try to play with bots, the game crashes. Checked the integrity, reinstalled the game, nothing helped.
Unhandled exception:

Unable to create directory C:\Users\111\Documents\Games\Gas Powered Games\Supreme Commander Forged Alliance\replays\

Program : G:\SteamLibrary\steamapps\common\Supreme Commander Forged Alliance\bin\SupremeCommander.exe
Cmd line arguments :

Callstack:
Unknown symbol (address 0x009132bc)

Last 100 lines of log...

info: UnitCap="500",
info: Victory="demoralization"
info: },
info: PlayerCount=4,
info: ProductCode="SC1X"
info: }
info: HERE IT IS{
info: GameName="1's Skirmish",
info: HostedBy="1",
info: Options={
info: AllowObservers=true,
info: CheatsEnabled="false",
info: CivilianAlliance="enemy",
info: FogOfWar="explored",
info: GameSpeed="normal",
info: NoRushOption="Off",
info: PrebuiltUnits="Off",
info: ScenarioFile="/maps/scmp_039/scmp_039_scenario.lua",
info: TeamLock="locked",
info: TeamSpawn="random",
info: Timeouts="3",
info: UnitCap="500",
info: Victory="demoralization"
info: },
info: PlayerCount=4,
info: ProductCode="SC1X"
info: }
info: HERE IT IS{
info: GameName="1's Skirmish",
info: HostedBy="1",
info: Options={
info: AllowObservers=true,
info: CheatsEnabled="false",
info: CivilianAlliance="enemy",
info: FogOfWar="explored",
info: GameSpeed="normal",
info: NoRushOption="Off",
info: PrebuiltUnits="Off",
info: ScenarioFile="/maps/scmp_039/scmp_039_scenario.lua",
info: TeamLock="locked",
info: TeamSpawn="random",
info: Timeouts="3",
info: UnitCap="500",
info: Victory="demoralization"
info: },
info: PlayerCount=4,
info: ProductCode="SC1X"
info: }
info: HERE IT IS{
info: GameName="1's Skirmish",
info: HostedBy="1",
info: Options={
info: AllowObservers=true,
info: CheatsEnabled="false",
info: CivilianAlliance="enemy",
info: FogOfWar="explored",
info: GameSpeed="normal",
info: NoRushOption="Off",
info: PrebuiltUnits="Off",
info: ScenarioFile="/maps/scmp_039/scmp_039_scenario.lua",
info: TeamLock="locked",
info: TeamSpawn="random",
info: Timeouts="3",
info: UnitCap="500",
info: Victory="demoralization"
info: },
info: PlayerCount=4,
info: ProductCode="SC1X"
info: }
info: HERE IT IS{
info: GameName="1's Skirmish",
info: HostedBy="1",
info: Options={
info: AllowObservers=true,
info: CheatsEnabled="false",
info: CivilianAlliance="enemy",
info: FogOfWar="explored",
info: GameSpeed="normal",
info: NoRushOption="Off",
info: PrebuiltUnits="Off",
info: ScenarioFile="/maps/scmp_039/scmp_039_scenario.lua",
info: TeamLock="locked",
info: TeamSpawn="random",
info: Timeouts="3",
info: UnitCap="500",
info: Victory="demoralization"
info: },
info: PlayerCount=4,
info: ProductCode="SC1X"
info: }
info: team = \0003\000 last = \0002
debug: Loading module '\000/lua/ui/lobby/ainames.lua\000'
debug: OpenMovie /movies/aeon_load.sfd: 1081
debug: Preparing movie /movies/aeon_load.sfd: 1081
debug: Preparing movie /movies/aeon_load.sfd: 1081
debug: Preparing movie /movies/aeon_load.sfd: 1081
debug: Preparing movie /movies/aeon_load.sfd: 1081
debug: Preparing movie /movies/aeon_load.sfd: 1081
debug: Preparing movie /movies/aeon_load.sfd: 1081
debug: Playing movie g:\steamlibrary\steamapps\common\supreme commander forged alliance\movies\aeon_load.sfd: 1081

java.util.concurrent.CompletionException: java.nio.file.NoSuchFileException: C:\Users\111\Documents\My Games
at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:332)
at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:347)
at java.base/java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:708)
at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2162)
at com.faforever.client.task.CompletableTask.lambda$new$1(CompletableTask.java:18)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.concurrent.EventHelper.fireEvent(EventHelper.java:219)
at javafx.concurrent.Task.fireEvent(Task.java:1359)
at javafx.concurrent.Task.setState(Task.java:709)
at javafx.concurrent.Task$TaskCallable.lambda$call$2(Task.java:1456)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:457)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:456)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:184)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.nio.file.NoSuchFileException: C:\Users\111\Documents\My Games
at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:85)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:108)
at java.base/sun.nio.fs.WindowsFileSystemProvider.createDirectory(WindowsFileSystemProvider.java:521)
at java.base/java.nio.file.Files.createDirectory(Files.java:700)
at java.base/java.nio.file.Files.createAndCheckIsDirectory(Files.java:807)
at java.base/java.nio.file.Files.createDirectories(Files.java:793)
at com.faforever.commons.io.Unzipper.unzip(Unzipper.java:45)
at com.faforever.client.map.DownloadMapTask.call(DownloadMapTask.java:57)
at com.faforever.client.map.DownloadMapTask.call(DownloadMapTask.java:19)
at javafx.concurrent.Task$TaskCallable.call(Task.java:1426)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
... 1 more