Ñetwork server connection issues

Hi all
I am a newish user of kodi I have just updated from 16 to kodi 17. I had to disconnect my box from the devolo home plug and now I am having network issues. My system info says connected. When I try to add a source.it says remote share ‘couldn’t connect to network server ‘.I have checked all typing and settings.system says link connected and Internet connected. Can anyone help a lost soul.not too technical please
Thanks
Geoff