[buzzard4312]

Thank you for your solution. I came to the same conclusion, that my earlier problem of the so called "invalid argument" had to do with SMB. But I only saw it on the RPi LibreElect version. This version of Kodi implements SMB using all three newer versions. However my version of Windows 10 only provides for SMBv1. So if I wanted to use SMB, I had to set Kodi to SMBv1 max. This was the only way I could connect to shares on my Local Area Network.
Adventures in PC Land should be the title of a best seller.