Hi! I had a similar problem with a launcher, and sometimes the issue stems from conflicts with certain background programs or Windows permissions. Try running the launcher as an administrator and temporarily disabling your antivirus/Windows Defender. Alternatively, creating a new Windows user account and running it from there may help. Sometimes, it's a minor corruption of the current profile, even after reinstallation.
I had a black screen in the Inn.games / 4game launcher after installing Ragnarok Online Prime. This was probably related to an older Ragnarok / 4game installation on the same PC. I had RO installed on this machine before, so old 4game2.0 launcher data was either not fully uninstalled or still present, as i (re)instaled it The usual fixes did not solve it: - deleting CEF/cache folders - deleting temp folders - reinstalling the launcher - disabling GPU acceleration / overlays - unplugging DisplayLink devices - disabling proxy auto-detection The launcher process was running, but the UI stayed black. CEF was started, but no page was created. With CEF remote debugging enabled, /json/list was empty before the fix. I created an elevated dump of Launcher.exe and analyzed it with dotnet-dump. The main UI thread was stuck during old launcher data migration: LauncherApplicationMediator.ApplicationStarted OldLauncherDataTransferService.TryTransferOldLauncherData OldLauncherDataTransferService.TransferGames GameInstaller.Register GameManager.GetGameIconData So the launcher was hanging while trying to import old 4game2.0 data from a previous installation. The fix was to move the old 4game2.0 data folder out of the way: C:\ProgramData\Innova\4game2.0 I renamed/moved it to a backup folder: C:\ProgramData\Innova\4game2.0.bak-YYYYMMDD-HHMMSS Admin rights were required. After that, the launcher started correctly. It created the browser page normally and began updating Ragnarok Online Prime instead of staying black.