Please copy the Kooboo.CMS.Sites.TemplateEngines.Razor.dll into the bin folder under Kooboo.CMS.Web manually. The build actions do not works without Windows.
And also, please remove the file "Microsoft.Web.Infrastructure.dll" from Kooboo.CMS.Web bin folder on mono.
If you just want to install Kooboo CMS on mono, I suggest you download the file Kooboo_CMS_mono.zip file, it can run on mono directly.
Regards,
Jifeng Huang
Kooboo Team
Microsoft ASP.NET MVP