Login window should appear.
An error happens
Rambox: v0.5.3
OS: Arch Linux
Arch: x64
This happens for me, too.

In this Window you can get a detailed error message:
Cannot read property 'contentWindow' of undefined. The calling function is TypeError: at HTMLDocument.set (<anonymous>:1:119)
at .titleDidChange (
FILE
Unknown
LINE
Unknown
STACK
TypeError: Cannot read property 'contentWindow' of undefined
at HTMLDocument.set (<anonymous>:1:119)
at .titleDidChange (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:889:1065)
at _notifyPropertyObservers (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:69:384)
at propertyDidChange (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:65:1052)
at set (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:64:1254)
at .<anonymous> (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:90:480)
at set (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:890:54)
at .updateTitle (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:889:270)
at run (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:840:637)
at r.<anonymous> (https://icloud.cdn-apple.com/system/cloudos/17BHotfix5/en-us/javascript-packed.js:950:153)
MOST RECENT STACK
SC.run
> args: function (){i.apply(s,r
)}, undefined, undefined, undefined, undefined
SC.Module._invokeCallback
> args: cloudos_foundation/language, SC.Application:sc1025, function (){window.localeDidLoad=!0,SC.Event.add(document,"mousemove",function(e){var t=CloudOS.appController.getPath("currentApp"),n={clientX:e.clientX,clientY:e.clientY},r;if(!t||!t.get("contentWindow")||!t.get("isReady"))return YES;t.passMessage("_mouseMove",n)}),SC.Event.add(document,"mouseup",function(e){var t=CloudOS.appController.getPath("currentApp"),n={clientX:e.clientX,clientY:e.clientY},r;if(!t||!t.get("contentWindow")||!t.get("isReady"))return YES;t.passMessage("_mouseUp",n)}),Object.defineProperty&&Object.defineProperty(window,"currentApp",{get:function(){return CloudOS.appController.getPath("currentApp.contentWindow")}});if(CloudOS.get("isCloudOSMini")){var e=CloudOS.appController.getDefaultAppName();CloudOS.displayApps.push({name:e,isDynamicallyLoaded:YES})}else CloudOSBootstrap.isOnSupportedMobile||SC.Module.loadModule("cloudos_foundation/springboard",this,function(){CloudOS.configureSpringboard()
});CloudOS.getPath("mainPage.mainPane").append(),SC.debug("CloudOS.main() already has localized strings, proceeding to run CloudOS.run() now."),CloudOS.run(),CloudOS.invokeDelegateMethod(t,"applicationDidStart"),CloudOS.set("mainHasCompleted",YES)}, cloudos_foundation/language, undefined
function (){SC.Module._invokeCallback(e,t,n,r)}
> args: undefined, undefined, undefined, undefined, undefined
SC.Module._invokeCallbacksForModule
> args: cloudos_foundation/language, undefined, undefined, undefined, undefined
SC.Module._moduleDidBecomeReady
> args: cloudos_foundation/language, undefined, undefined, undefined, undefined
function (){n.isReady=YES,this._moduleDidBecomeReady(e)}
> args: undefined, undefined, undefined, undefined, undefined
SC.ObserverSet.invokeMethods
> args: undefined, undefined, undefined, undefined, undefined
SC.Object#_flushinvokeLastQueue
> args: undefined, undefined, undefined, undefined, undefined
SC.Object#flushAllPending
> args: undefined, undefined, undefined, undefined, undefined
SC.Object#endRunLoop
> args: undefined, undefined, undefined, undefined, undefined
function (){var i=n[r],s;if(!i)throw new Error("No '"+r+"' method was found on the superclass");return t.isEnhancement?s=Array.prototype.slice.call(ar
> args: undefined, undefined, undefined, undefined, undefined
SC.RunLoop#endRunLoop
> args: undefined, undefined, undefined, undefined, undefined
SC.Object.end
> args: undefined, undefined, undefined, undefined, undefined
SC.run
> args: function (){i.apply(s,r
)}, undefined, undefined, undefined, undefined
(Because SC.run was called recursively, no more of the stack is available)
IS FATAL
true
TYPE
exception
APPLICATION NAME
cloudos
APP STATECHART
SC.Statechart:sc1155
initialized: true
name: cloudos-statechart
current-states: [
loading
]
state-transition:
active: false
suspended: false
handling-event: false
BUILD NUMBER
17BHotfix5
MASTERING NUMBER
17BHotfix5
TIME
Thu Mar 30 2017 10:57:24 GMT+0200 (Mitteleuropäische Sommerzeit) (1490864244415)
HOST
www.icloud.com
USER AGENT
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Rambox/0.5.3 Chrome/53.0.2785.143 Electron/1.4.15 Safari/537.36
ENVIRONMENT
PROD
RECENT LOG MESSAGES
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: Adding new link tag with href = '/system/cloudos/17BHotfix5/de-de/stylesheet-packed.css'.
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Attempting to load 'cloudos_foundation/language'
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Module 'cloudos_foundation/language' is not loaded, loading now.
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Loading CSS file in 'cloudos_foundation/language' -> '/system/cloudos/17BHotfix5/cloudos_foundation/language/17BHotfix5/de-de/stylesheet.css'
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Loading JavaScript file in 'cloudos_foundation/language' -> '/system/cloudos/17BHotfix5/cloudos_foundation/language/17BHotfix5/de-de/javascript-strings.js'
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: Removing old link tag with href = '/system/cloudos/17BHotfix5/en-us/stylesheet-packed.css'.
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Module 'cloudos_foundation/language' finished loading.
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Evaluating and invoking callbacks for 'cloudos_foundation/language'.
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Module 'cloudos_foundation/language' has completed loading, invoking callbacks.
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Attempting to load 'cloudos_foundation/springboard'
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Module 'cloudos_foundation/springboard' is not loaded, loading now.
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Loading CSS file in 'cloudos_foundation/springboard' -> '/system/cloudos/17BHotfix5/cloudos_foundation/springboard/17BHotfix5/de-de/stylesheet.css'
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: SC.Module: Loading JavaScript file in 'cloudos_foundation/springboard' -> '/system/cloudos/17BHotfix5/cloudos_foundation/springboard/17BHotfix5/de-de/javascript.js'
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: CloudOS.main() already has localized strings, proceeding to run CloudOS.run() now.
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: CloudOS window is visible initially
Thu, 30 Mar 2017 08:57:23 GMT: DEBUG: Loading localized strings and metrics
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: --> Request 1: GET to https://www.icloud.com/applications/newspublisher/current/info.json, headers: Content-Type=text/plain, body: (omitted)
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: BEGIN initialize statechart
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: BEGIN gotoState: __ROOT_STATE__
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: starting from current state: ---
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: current states before: ---
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: --> entering state: __ROOT_STATE__
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: --> entering state: loading
Thu, 30 Mar 2017 08:57:24 GMT: INFO: Trying to load font SFNSText
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: current states after: loading
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: END gotoState: __ROOT_STATE__
Thu, 30 Mar 2017 08:57:24 GMT: INFO: SC.Statechart<cloudos-statechart, sc1155>: END initialize statechart
Thu, 30 Mar 2017 08:57:24 GMT: INFO: Spent 214 ms symbolicating
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: CloudKit: ErrorCatcher dialog invoked.
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: SC.Module: Attempting to load 'cloudkit/error_catcher'
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: SC.Module: Module 'cloudkit/error_catcher' is not loaded, loading now.
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: SC.Module: Loading CSS file in 'cloudkit/error_catcher' -> '/system/cloudos/17BHotfix5/cloudkit/error_catcher/17BHotfix5/de-de/stylesheet.css'
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: SC.Module: Loading JavaScript file in 'cloudkit/error_catcher' -> '/system/cloudos/17BHotfix5/cloudkit/error_catcher/17BHotfix5/de-de/javascript-strings.js'
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: Language check for CloudOS: null -> de-de. We WILL relocalize cloudOS.
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: <-- Response 1: 200 (393ms), headers: Accept-Ranges=bytes, Access-Control-Allow-Origin=*, Cache-Control=public, max-age=300, Content-Encoding=gzip, Content-Language=en-us, Content-Length=171, Content-Type=application/json, Date=Thu, 30 Mar 2017 08:56:51 GMT, ETag="fd-548364dd82cc0", Server=Apache, Vary=Accept-Encoding, X-Responding-Instance=anton-apache:22503@st14p25ic-hpaf08101201:9081:1M34 body: (omitted)
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: Adding additional data for newspublisher
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: Since there is no account prefs yet, we will set the locale of “newspublisher” as en-us
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: SC.Module: Module 'cloudkit/error_catcher' finished loading.
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: SC.Module: Evaluating and invoking callbacks for 'cloudkit/error_catcher'.
Thu, 30 Mar 2017 08:57:24 GMT: DEBUG: SC.Module: Module 'cloudkit/error_catcher' has completed loading, invoking callbacks.
Can anyone translate the previous image attached?
"iCloud" has stopped responding.
The program was interrupted due to an error. You can help Apple improve our products by providing us with diagnostic and usage information by sending it to us via iCloud.
-> Details
If you click on "Send to Apple", you accept that Apple may collect this information in the scope of support services and use it to improve products and services. This report includes personalized data like your user name and user data. You can find more infromation about Apples privacy guideline at https://www.apple.com/privacy/Reload | Send to Apple
Thanks @SimJoSt! I will investigate.
Xubuntu 16.10 here, same problem.
Looks like a Linux related error
This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
Most helpful comment
Thanks @SimJoSt! I will investigate.