Out of the blue I get errors (edit: in Firebug console) thrown at me when deploying my app. I didn't change anything since last time when I deployed my app (3 days ago).

Error I get when loading the "Trust it"-page of my app is:

Load denied by X-Frame-Options: https://portal.office.com/landing.aspx? does not permit cross-origin framing.

When I then click "Trust it" i get more errors on my app-homepage:

"NetworkError: 503 Service Unavailable - https://cdn.sharepointonline.com/12359/_layouts/15/16.0.3222.1229/1043/initstrings.js"

ReferenceError: Strings is not defined https://cdn.sharepointonline.com/12359/_layouts/15/16.0.3222.1229/clienttemplates.js Line 1

"NetworkError: 503 Service Unavailable - https://cdn.sharepointonline.com/12359/_layouts/15/16.0.3222.1229/1043/SP.Res.js" SP.Res.js

"NetworkError: 503 Service Unavailable - https://cdn.sharepointonline.com/12359/_layouts/15/16.0.3222.1229/1043/strings.js" strings.js

Further I am nog logged on to a network, I am just working on my laptop with an internet connection. Besides those errors the app seems to work just fine, what is even stranger I suppose.

Does anyone know where this is coming from and how to fix it? Thanks in advance!!!

Edit: When login on on portal.office manually I get the following warning:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at [url]. This can be fixed by moving the resource to the same domain or enabling CORS. [url]

This appears to be a security issue?

1 Answer 1


There appears to be degraded service according to the service status page for O365. Log into your online account and check the status.


Click the yellow arrow under the SharePoint Features column for today and you can see more details.

  • Ah ok, so apparently it is nothing I can do myself about it. Thanks Josh! Commented Sep 29, 2014 at 16:10

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