Press CTRL-C to kill all processes and restore the configuration files.
SKA alerts you if there are some problems with NetworkManager demon or Apache configuration file. Anyway you could find the answers to your problems in the links below:
resolve Network Manager conflict 1
section: “Resolve airmon-ng and Network Manager Conflict”
resolve Network Manager conflict 2
Disable DNS line in your NetworkManager configuration file (look into /etc/NetworkManager/):
Insert the MAC of your wireless adapter between the unmanaged devices to allow hostapd works properly: