thank you for getting an answer, I have to say that it´s not the latest version of the Nik filters, it´s the free version. But
I found a way, how it works. If you press the ok button after using the Nik filters and nothing happens you go to your filter panel and press the latest filter you have used and it works. But you don´t get a layer for your filter. If you want a layer you can press strg + j before you use your Nik filters and you have got your layer. A few more clicks and it works like before. I hope that it was helpful. Or has someone got another idea?