missing installer.json causes empty window

I just upgraded to F28. When I launch the desktop app in Fedora, I get only a frame and the white background. I think that I am missing the installer.json file

[sbb@dingo ~]$ /opt/keybase/Keybase
Error loading state: { Error: /home/sbb/.config/Keybase/installer.json: ENOENT: no such file or directory, open '/home/sbb/.config/Keybase/installer.json'
at Object.fs.openSync (fs.js:652:18)
at Object.module.(anonymous function) [as openSync] (ELECTRON_ASAR.js:172:20)
at Object.fs.readFileSync (fs.js:553:33)
at Object.fs.readFileSync (ELECTRON_ASAR.js:508:29)
at Object.readFileSync (/opt/keybase/resources/app/desktop/dist/main.bundle.js:1:17468)
at Xf.promptedForCLI.Xf (/opt/keybase/resources/app/desktop/dist/main.bundle.js:1:243518)
at Xf.promptedForCLI (/opt/keybase/resources/app/desktop/dist/main.bundle.js:1:243669)
at Object.e.version (/opt/keybase/resources/app/desktop/dist/main.bundle.js:1:243665)
at r (/opt/keybase/resources/app/desktop/dist/main.bundle.js:1:265)
at /opt/keybase/resources/app/desktop/dist/main.bundle.js:1:680
errno: -2,
code: 'ENOENT',
syscall: 'open',
path: '/home/sbb/.config/Keybase/installer.json' }
Only one instance of keybase GUI allowed, bailing!
[sbb@dingo ~]$ ls ~/.config/Keybase/
app-state.json Cookies-journal SingletonCookie
Cache/ GPUCache/ SingletonLock
Cookies Preferences SS

Reproduce the Fedora desktop launch with /home/sbb/.config/Keybase/installer.json absent, then trace the installer.json read shown in the bundled Electron stack at /opt/keybase/resources/app/desktop/dist/main.bundle.js. Done means the app no longer opens as an empty window when that file is missing.