I have a community site tthat  is displayed as blank for guest users even if they have permission to see it. Do you have any ideea what can be the cause ?  

PS: I activated the workspace.

I am facing a strange error with Einstein Next Best Action. I created a set of recommendation. The recommendation worked without an issue, however now for one of the cases it gives me this error: 

Something went wrong while fetching recommendations.

I did not change anytthing from when it worked. I mention also that i could not find any solution or what can cause such a strange error

I am investigating the view state of a vf page button. The problem is once i pressed the button the view state is not displaying. I already did the proper setup in order to view the view state.