Mac OS 10.14.2
1.8.6
Show select schema url dialog
After update and restart GraphQL playground opens with empty screen
Happens after update
_Please provide a gif or image of the issue for a quicker response/fix._

Same here.
As a workaround, I re-installed via brew cask reinstall graphql-playground which put 1.8.5 back on, and choose Later when prompted for the upgrade.
Yes, something went wrong with electron build, trying to figure out what is happening. Sorry for troubles, current workaround is to download the old version.
Happening for me on Windows 10 with the new install for both 1.8.6 and 1.8.5. For now, I'll just use GraphiQL until there's a fix.
OSX 1.8.6 release also broken. Reverting back to 1.8.5.
Reverting to v1.8.5 works but you need to also disable automatic updates as it automatically updates next update hence when you close the app it will go back to v1.8.6.
Exception from dev tools
Uncaught Error: Selector creators expect all input-selectors to be functions, instead received the following types: [undefined]
at getDependencies (app.8c44a0fc16de2643d78e.js:11960)
at Object.createSelector (app.8c44a0fc16de2643d78e.js:11978)
at Object.defineProperty.value (app.8c44a0fc16de2643d78e.js:13815)
at __webpack_require__ (vendor.8c44a0fc16de2643d78e.js:55)
at Object._typeof (app.8c44a0fc16de2643d78e.js:50532)
at __webpack_require__ (vendor.8c44a0fc16de2643d78e.js:55)
at Object.defineProperty.value (app.8c44a0fc16de2643d78e.js:20039)
at __webpack_require__ (vendor.8c44a0fc16de2643d78e.js:55)
at Object.defineProperty.value (app.8c44a0fc16de2643d78e.js:69812)
at __webpack_require__ (vendor.8c44a0fc16de2643d78e.js:55)
Any knows how to disable updates?
Sorry for troubles, it should be fixed in latest release.
Most helpful comment
Same here.
As a workaround, I re-installed via
brew cask reinstall graphql-playgroundwhich put1.8.5back on, and choose Later when prompted for the upgrade.