There are some good dieticians & there are some … well… lousy ones. Is there any way you could find another dietician? Telling you to go to back to shakes is a bad suggestion like @summerseeker said. They should have gone through what you’ve been eating & make suggestions from there. The goal is to be eating real food not highly processed synthesised shakes loaded with artificial sweeteners & such.
Stalls are frustrating. No way aground that but they are an important part of your weight loss when your body takes stock of your new needs & adjusts digestive hormones, etc. Best advice is to stick to your plan. Don’t make changes & stress your body more. The stall will break when your body is ready.
Good advice from @summerseeker too about going back to the basics of protein first, then vegetables & then low processed complex multi/ whole grain carbs if you can eat more. Make cause you’re hitting your protein & fluid goals.
Calories are a bit of a touchy issue at the moment in the medical world. Some are anti some are pro. A lot is around a calorie is a calorie regardless of what the food source is versus nutrient value. Plus, caloric needs differs so much person to person - age, gender, activity, metabolism, general health, hormones, etc. all affect how many you need. Personally I think if you are eating nutrient dense food, having an idea of calories can help you stay on track & guide you if you’re sliding.