How to fix this ??

In your digibyte.conf file change the
rpcallowip=192.168.1.* to either
rpcallowip=192.168.1.0/24 or
rpcallowip=192.168.1.0/255.255.255.0Where is located digibyte.conf file

If I remember correctly, off the top of my head, if you're on Linux, look in ~/.digibyte and if you're using Windows, look in %APPDATA%\DigiByte (or C:\Users\
your_user_name\AppData\Roaming\DigiByte)