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Fixed in 2017.3.0f3

Fixed in 2017.1, 2017.2, 2017.3



Found in


Issue ID




Unity doesn't start when blocked by firewall or when internet connection is poor



1. Get FirewallAppBlocker, or anything like it, or do it manually through win firewall
2. Search for all .exe files with win search, select them all, drag on Fab, or manually add them all to windows firewall and block
3. Launch unity, close, repeat until it fails to load (mine fails on second launch - first loads ok, then fails)

It fails either to a white screen with a loadbar, or (a new one) to just a black window.

Editor log:

LICENSE SYSTEM [2017731 13:13:24] No start/stop license dates set

LICENSE SYSTEM [2017731 13:13:24] Next license update check is after 2017-07-31T18:59:12

Built from '2017.1/release' branch; Version is '2017.1.0f3 (472613c02cf7) revision 4662803'; Using compiler version '160040219'
OS: 'Windows 7 (6.1.7600) 64bit' Language: 'en' Physical Memory: 16325 MB
BatchMode: 0, IsHumanControllingUs: 1, StartBugReporterOnCrash: 1, Is64bit: 1, IsPro: 0

[CEF] undefined in file:///C%3A%2FUsers%2Falex%2FAppData%2FRoaming%2FUnity%2FPackages%2Fnode_modules%2Funity-editor-home%2Fdist/assets/unity-editor-home.js at line 39
Error loading

(Filename: C:\buildslave\unity\build\Editor/Platform/Interface/NativeWebViewWindow.cpp Line: 51)

There is more info in this forum post:

Comments (12)

  1. Fefe73ae25b6c22255ea6aaec461df82?d=mm


    Sep 27, 2017 15:04

    Experiencing this with several computers. The result is we aren't able to open any projects, even new ones, in versions of Unity going back to at least 5.6.0f1. We've had the issue with 2017.1.0f3 and Unity 2017.1.1 as well. Usually a project will open the first time, and then no project will open after in any version of Unity. Started happening after installing 2017.3.0 Beta 1.

  2. 23e689da7f1c470063f647a9783a9417?d=mm


    Sep 27, 2017 12:47

    Same with Unity 2017.1.0p4. Cant open my project anymore.

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