[pulsar124]

Here is the kodi log file:

https://paste.kodi.tv/cejopuhiwe.kodi

I did also enable the AS logging feature, but I don't see relevant lines in the kodi log file. Is it in a separate file somewhere? I also don't see any references to the override SMB folder containing my images (contains keyword PHOTO), so it doesn't look complete. 

For some reason the Estuary skin is not running Artist Slideshow.  I've tried the 18.5 Estuary skin on my machine here, and it activates AS as I would expect.  Your log is showing that Kodi thinks AS is disabled (I can see it's installed at the beginning of the log).  Let's try this:

1- Go to Addons
2- Go up to the little icon that looks like an open box. That should give you a screen whose first entry is My Addons.
3- Go into My Addons and then scroll down to Program Addons and select it.

You should have a list of your installed program addons.  If there is a little X by Artist Slideshow, it's disabled.  You need to bring up the context menu (it's 'c' on a keyboard, unfortunately I have no idea how you bring that up with your TV remote) and select ENABLE.

If AS is already enabled, then I'm at a loss.  You might need to post this question in the Estuary support thread (where I'm likely to jump in anyway) because it seems to be a skin problem we haven't seen before.

https://forum.kodi.tv/forumdisplay.php?fid=260 

I just checked, and AS is enabled, so no easy fix for me. Thanks for looking into this!