Could not load type 'MonoDevelop.AspNet.AspNetAppProject'

After upgrading to monodevelop 5.3 from git I could no longer load asp projects. I always received the following error.

Could not load type ‘MonoDevelop.AspNet.AspNetAppProject’ from assembly ‘MonoDevelop.AspNet

There is a quick fix. Disable and renable the monodevelop asp add-ins.

Tools -> Add-in Manager ->Web Development Disable and enable all web add-ins. Reload your solution and it should work.