Seems that it's just the installation that fails.
Adding the files manualy to Modules and ModulesResources and modulesbin seems to work.
I believe that you accidently deploy/have those DLL in bin folder.
Having the same DLL in both bin and modulesbin will crashed the site, as designed of .NET.
Spellschecker does not deploy CMS.Shell.UI and Shell.UI DLLs.
No I didn't have any dlls for the Spellchecker in the bin.
My fix was to take all the files from the VPP folder Modules and ModulesResources and add them manualy to the file system and then drop the two dlls in my modules bin. So there by doing the installation manually.
Well, your error is about EPiServer.Cms.Shell.UI.dll and EPiServer.Shell.UI.dll stay in <%mywebsite%>\bin.
By default of CMS7.5, I don't see them in bin folder. They should be in modulesbin folder by default.
The addon cannot copy it to your bin, because addon package doesn't contain those DLL, and addon installation touchs nothing to the bin folder.
Right, so we blame the upgrade to 7.6 then? ;)
Thanks for clearing up the issue
Haha, didn't notice the spelling of the forum thread until now. Kudos for that ;)
You have to have fun where you can at work ;)
Is this addon not compatible with EPiServer 7.5? Or the installation atleast?
Trying to add it but I'm getting
EPiServer.Packaging.SitePackageManager.ValidateNoDuplicatedAssemblies - Aborting operation. The following add-on assemblies exist in the main 'bin' directory: <%mywebsite%>\bin\EPiServer.Cms.Shell.UI.dll, <%mywebsite%>\bin\EPiServer.Shell.UI.dll
Should the shell.ui and cms.shell.ui dll be moved to the modulesbin? But then the nuget updates wont work. Or am I just missing something basic?