Luchetto

I have just bought and installed Affinity Photo. When I read either Nikon RAW Pictures (NIKON 810 and NIKON Z6) or SONY (SONY RX100) I cannot close anymore Affinity normally. I get the message (translated from german) "At least one file is beeing developed, close this acitivity or Interrupt it before you close the program). I have done nothing on the Pictures.