For some reason Kodi’s internal DNS resolver isn’t working. No clue why. I’d rebuild your library with your sources changed to the PC’s IP address or do a path substitution to get the same end result. For path substitution you would use something like…
<advancedsettings>
<pathsubstitution>
<substitute>
<from>smb://Acer-mb/</from>
<to>smb://192.168.1.10</to>
</substitute>
</pathsubstitution>
</advancedsettings>
But using the PC’s actual IP address where I typed in 192.168.1.10. Further instructions can be found in the following howto…