How can I solve these errors? Suddenly I can't cook or package my project!

I’m not sure when it all started. I believe it could have been by the time I updated the engine from 4.9 to 4.10 and visual studio community 13 to 15. I’m getting errors that keep preventing me from cooking and packaging my project. A couple of days ago it was working fine. I’m going to attach both errors. Please, can someone help me find out what is causing those problems?