Cant start unity 5.5B4

On my laptop i normally use i was able to start unity with no problem, the same version. That laptop went to the factory for repairs and so i got a temprairy replacement laptop. However in this laptop i cant get unity 5.5B4 to start.

Unity will show its normal windows where you can select projects, but instead of showing something its just the grey splash screen.

this is the unity editor log file:

Built from ‘trunk’ branch; Version is ‘5.5.0b4 (9f8737ccd563) revision 10454839’; Using compiler version ‘160040219’
OS: ‘Windows 10 (10.0.0) 64bit’ Language: ‘en’ Physical Memory: 6066 MB
BatchMode: 0, IsHumanControllingUs: 1, StartBugReporterOnCrash: 1, Is64bit: 1, IsPro: 0
Initialize mono
Mono path[0] = ‘C:/Program Files/Unity 5.5.0b4/Editor/Data/Managed’
Mono path[1] = ‘C:/Program Files/Unity 5.5.0b4/Editor/Data/Mono/lib/mono/2.0’
Mono path[2] = ‘C:/Program Files/Unity 5.5.0b4/Editor/Data/UnityScript’
Mono config path = ‘C:/Program Files/Unity 5.5.0b4/Editor/Data/Mono/etc’
Using monoOptions --debugger-agent=transport=dt_socket,embedding=1,defer=y,address=0.0.0.0:56044
ListPackages failed, output:
Error parsing output of npm ls

(Filename: C:\buildslave\unity\build\Editor/Src/JavascriptPackageManager.cpp Line: 153)

InstallEditorPackages failed, output:
installJavascriptPackages failed

(Filename: C:\buildslave\unity\build\Runtime/Utilities/Argv.cpp Line: 171)

Error loading file:///C%3A%2FUsers%2FWilco%2FAppData%2FRoaming%2FUnity%2FPackages%2Fnode_modules%2Funity-editor-home%2Fdist/index.html#/project/recent

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

You might say, you should try to install unity 5.4 stable, but 5.5B4 worked on my other laptop so it SHOULDNT be the problem, i think it has something to do with nodejs but i already replaced the nodejs module exe and that didnt make a difference.

Edit
{
I just found out the node_modules directory in %appdata%/Unity does not exist, i tried to run the installer 2 more times, didnt fix it.
}

Thanks in advance! :slight_smile:

I had the same problem a while ago and this worked for me:

https://forum.unity3d.com/threads/unity3d-5-3-not-working.372682/#post-2415582