always post the entire error message in text form instead of making a screenshot of a fraction of the error message
also post the complete game and client log

uninstall the client and wipe the install folder in case anything is left after the uninstall

then install again and hope that your OS didn't remember you wanting to run the app with admin perms for some reason

your windows user may be an admin but that doesn't mean that you are executing anything as admin (you still get a prompt if something needs admin rights in windows unless you disabled the user account control in windows)
also don't run stuff as admin unless you know what you're doing

your friend should post his game and client log

@Jasy this doesn't sound anything like what the OP describes.
Please make your own Thread and try to describe your issue properly and post a client and game

it just bothered me and assumed that it wouldn't show up after deleting the map folder (assuming it exists)

Caused by: java.nio.file.FileSystemException: C:\ProgramData\FAForever\bin\BsSndRpt.exe: Процесс не может получить доступ к файлу, так как этот файл занят другим процессом.
(google Translate) -> The process cannot access the file because the file is occupied by another process
i'd start with checking if you have write permissions issues in C:\ProgramData\FAForever\bin or if you had the client running a 2nd time

2020-08-18 00:09:15.955 WARN 13140 --- [JavaFX Application Thread] c.faforever.client.coop.CoopController : No coop mission found for folder name: nmca_002
I suggest you delete the nmca_002 folder in %userprofile%\Documents\My Games\Gas Powered Games\Supreme Commander Forged Alliance\maps

please post a client log
the log files are located in C:\ProgramData\FAForever\logs\

@Hakkapeliitta https://forum.faforever.com/topic/1/welcome-to-the-new-faforever-forum