win11, it loads to a black "keybase" window but does not finish loading

Keybase GUI Version: 6.0.1-20220609140211+0fc9feea3d

error on startup:

Version: 6.0.1-20220609140211+0fc9feea3d
requestWindowsStartService: starting keybase.exe
Not connected - starting keybase
expected path to keybase binaries is C:\Users\\AppData\Local\Keybase
Error occurred in handler for 'KBkeybase': Error: spawn EPERM
at ChildProcess.spawn (node:internal/child_process:412:11)
at spawn (node:child_process:707:9)
at start_win_service_desktop (C:\Users\\AppData\Local\Keybase\Gui\resources\app\desktop\dist\node.bundle.js:1:122009)
at C:\Users\\AppData\Local\Keybase\Gui\resources\app\desktop\dist\node.bundle.js:1:122053
at node:electron/js2c/browser_init:193:579
at EventEmitter. (node:electron/js2c/browser_init:161:10433)
at EventEmitter.emit (node:events:390:28) {
errno: -4048,
code: 'EPERM',
syscall: 'spawn'
}

This is on win11, it loads to a black "keybase" window but does not finish loading.
I tried the various fixes in other posts including the "keybasefix" from https://github.com/keybase/client/issues/25138 and nothing works.

Start with the Windows startup path and the `start_win_service_desktop` stack entry in `node.bundle.js`, using the reported `spawn EPERM` error as the reproduction signal. Verify behavior with Keybase GUI version 6.0.1 on Windows 11; done means the GUI finishes loading instead of remaining on a black window.

Written by the indexing model from the issue text.