I'm not sure if this is right place to ask, but I can't come up with better one for now.

Issue is, when I want to open wolfram cloud notebook (clicking "go to code" link in wolfram alpha answers, or "create new Notebook" here), it doesn't work. Frame (top bar and central area split into two parts, one for input one for I forgot what) appears, flashes and then disappears, leaving window white without any input prompt. Only thing left is a moving blue bar on top, in style of modern loading bars indicating that program is working without giving any time estimate.

Issue happens on Firefox 56 (win7) and 63(win7 and win10), does not appear version dependant.

Help please.

  • 2
    $\begingroup$ Please contact WRI Support. $\endgroup$
    – Kuba
    Commented Nov 27, 2018 at 13:51
  • $\begingroup$ I have the same issue on Chrome and Firefox since yesterday. $\endgroup$
    – Klangen
    Commented Nov 28, 2018 at 14:37
  • $\begingroup$ Same problem here (Dec 22 2018) Firefox, Chrome, MSIE $\endgroup$
    – David
    Commented Dec 22, 2018 at 11:10
  • $\begingroup$ @Klangen Been a while, but, if you still have issues, try answer I just posted. $\endgroup$
    – M i ech
    Commented Feb 1, 2019 at 14:02
  • $\begingroup$ @David Been a while, but, if you still have issues, try answer I just posted. $\endgroup$
    – M i ech
    Commented Feb 1, 2019 at 14:02

2 Answers 2


I'm posting this as answer, because this did resolve the issue in at least one computer, even though it makes little sense. I'll test it on another problematic machine and browser, if "fix" works, I'm going to mark this as accepted.

It turns out, problem was somehow related to AdBlock Plus, despite AdBlock icon being greyed out on Wolfram Cloud, details shown after clicking AdBlock icon even said it's offline on Wolfram Cloud. Enabling (!) AdBlock fixed the issue and now, Wolfram Cloud works properly no matter if Wolfram Cloud is whitelisted or not.

EDIT: Welp. It's not universal. Got same issue on another machine, which has freshly installed Win10/Firefox(64.0.2 64bit), everything's so fresh that it never even had AdBlock installed. Installing AdBlock to meddle with it did not fix the issue.


The problem seems to be that the URL you are using (lab.open.wolframcloud.com) is a deprecated one. It doesn't work for me either. But when I instead go to the URL develop.wolframcloud.com, everything works just fine.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.