Morphs doesnt work in project

Hey, everybody. I have a project and I was working with morphs there, everything worked fine. And after the weekend, I sit down to do the work and suddenly all the morphs that were on the models just do not work. They are shown in the preview panel, but they are gray and you can’t change the weight. It doesn’t work through Blueprints either. I checked on other models and skeletons and the same thing.
For testing I sent the skeletons to another project and everything works there. I don’t understand what it can be. Does anyone have any options?