You do not have to set any static IP address on your phone. Go to the properties of the network adapter connected to the internet> Sharing tab, make sure both boxes are unchecked. Then try to reset your network connections: Open PowerShell or Command Prompt and run as administrator, copy and paste the following commands by pressing enter at the end of each command line:
netsh winsock reset
netsh int ip reset
Close and restart the pc. Then try to enable the mobile hotspot.