Hi,

Exactly what version of EPiServer 7.5 are you running now? Could you check the File Version for EPiServer.dll?

7.5.1003.0 for the bin stuff and 3.0.1097 for the CMS parts in Modules

Ok, when I installed 7.5.1003.0 the following was added below <protectedModules>:
<add name="Shell"/>
<add name="CMS"/>

Maybe something failed during installation of NuGet packages (if you installed it through NuGet that is)?

Yep rand the Nuget (don't think there is any other way) but seems I didn't get that config update. 

Tried adding it but saddly no difference.

Not sure if it will fix the problem, but I would try getting the latest NUGET packages and run the Move-EPiServerProtectedModules command as described in this blog post (http://world.episerver.com/Blogs/Khurram-Hanif/Dates/2014/3/EPiServer-76-Protected-Site-Add-Ons-location/). Doing that, you will be on the latest version, and hopefully it might just fix your issue as well.

Running Owl so can't go past 7.5 atm... but will give that a go if nothing else comes to mind when they update the owl package.

Or will that just update the ui?

Updated to 7.6 but still the same issue.

So I redid the upgrade and I'm getting the same error in edit mode but this time the Migration tool gets an error that seems connected 

The modules finder couldn't find a directory at '~/epiui/Shell'
Parameter name: moduleResourcePath

at EPiServer.Shell.Modules.ModuleFinder.GetModuleInDirectory(String routeBasePath, String moduleResourcePath, IEnumerable`1 configuredAssemblyNames, AutoDiscoveryLevel discoveryMode, String configuredName)
at EPiServer.Shell.Modules.ConfigModuleProvider.GetConfiguredModules(ModulesElementCollection configuredModules)
at EPiServer.Shell.Modules.ConfigModuleProvider.GetModules()
at System.Linq.Enumerable.<SelectManyIterator>d__14`2.MoveNext()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at EPiServer.Shell.Modules.ShellModule.MergeDuplicateModules(IEnumerable`1 modules)
at EPiServer.Shell.ShellInitialization.Initialize(InitializationEngine context)
at EPiServer.Framework.Initialization.ModuleNode.Execute(Action a, String key)
at EPiServer.Framework.Initialization.InitializationEngine.InitializeModules()
at EPiServer.Framework.Initialization.InitializationEngine.Initialize(HostType hostType)
at EPiServer.Framework.Initialization.InitializationModule.Initialize(HostType hostType)
at EPiServer.Framework.Initialization.InitializationModule.FrameworkInitialization(HostType hostType)
at VppMigrationTool.Util.SiteProxy.InitalizeEPiServer(String webConfigPath) in d:\Builds\132\EPiServerCMS Modules\VppMigrationTool\Sources\C\TFS\VppMigrationTool\Util\SiteProxy.cs:line 52
at VppMigrationTool.Util.SiteProxy.Initialize(String destinationPath, String virtualDirectory) in d:\Builds\132\EPiServerCMS Modules\VppMigrationTool\Sources\C\TFS\VppMigrationTool\Util\SiteProxy.cs:line 129
at VppMigrationTool.Util.SiteProxy.Initialize(String destinationPath, String virtualDirectory)
at VppMigrationTool.Converter.get_RuntimeProxyWrapper() in d:\Builds\132\EPiServerCMS Modules\VppMigrationTool\Sources\C\TFS\VppMigrationTool\Converter.cs:line 52
at VppMigrationTool.Converter.FillSiteData() in d:\Builds\132\EPiServerCMS Modules\VppMigrationTool\Sources\C\TFS\VppMigrationTool\Converter.cs:line 101

Does the stracktrace give any one Ideas?

Hmm.. could it be that I need to upgrade to 7.5 first and run the tool there before going to 7.6?

I'm not sure exactly what is wrong in this case but I want to verify something that is not entirely clear from what has been said so far:

When upgrading from 7.0/7.1 to 7.5 did you first do the upgrade to original 7.5 release in EPi Deployment Center and after that installed the latest 7.5.x release using nuget? Did the site work after the initial 7.5 upgrade? (The original 7.5 release is the intended starting point when installing the later 7.5.x releases.)

Right might have been a bit unclear.

Yes I downloaded the 7.5.3x from world and ran the upgrade script  from deployment center. Then did the nuget upgrade suff. Didn't check the site inbetween but will get right on it.

Doing the Migration on that version worked.

But still get the same issue with the UI paths.

Have you installed the nuget package for the UI as well? I thinkt there was a package for that as well. Someone wrote a post about that somewere :)

Not sure what package your refering to. But I did run the Upgade/disable add-ons script and now after you comment I also updated the EPiServer.CMS.UI nuget package but no difference.

I think it was that one, sadly.

To check that it's not a corrupt download on my machine I created a fresh 7.5 site via the Deployment Center.

On this one edit and admin works. 

I have compared all the files in Modues and the EPi dll:s in bin for my site and the new 7.5. Both have the same versions and files.

Been trying this backwards and forwards for a while now.. and from what I can figure out the issue has to do with some of the wiring of the site. 

For my  [appDataPath]\Modules folder contains the right files and I can access em if I go directly to the URL say,  /epiui/cms/javascript/system.js (ie the file that isn't loading with in edit)

But when the interface tries to load the resources it tries to go to: 

/ui/javascript/system.js

Same for admin, I can go to /epiui/cms/admin/default.aspx but from the GUI the link is ui/admin/default.aspx

And when I go to admin with the right URL it tries to load the masterpage from the /ui/MasterPages/Frameworks/Framework.Master

Fixed!

So the issue was that my episerver.config didn't get updated. So I had <site> and <sitesettings> elements in there when I should have had <applicationsettings>

There is a newly registered bug (#112774) on this issue, which is still in active state. This bug can occur on upgraded sites (7.6.3) when running vpp migration tool, mirroring etc.  

Great thanks. A nice to have feature for the bug fix would be to make the <site> and <sitesettings> element not valid in the config anymore. That way you would get a nice error about it =)

Nice to know