Icon folder are not really nice i would like to understand how to have a “Serie Icon” and then artwork per season (for this it is ok)
i have only 1 serie where the SERIE artwork was found automatically and then 1 artwork per season.
but for most of my files, the SERIE folder remain the ugly grey icon.
It sounds as though it could be how you have the series folder named and the season folders named inside of that.
For one of the series that is giving you the grey icon could you provide an example of how you have the series folder and season folders named? Also include how you have the name of an episode in that series.