Error opening all forms

Hello,

I closed a project I was working on a few days ago – reopened it today and now all my forms won’t open. I get messages like this in visual studio 2022:

Unable to cast object of type ‘Wisej.Web.UserControl’ to type ‘Wisej.Core.IWisejControl’

Unable to cast object of type ‘Wisej.Web.Form’ to type ‘Wisej.Core.IWisejControl’

Note sure why this is happening – anything I can check ?