[DanCooper]

Is there an option or advanced setting that kan make Season 0 in Ember called Specials?

No. Please add a feature request if you want that option: Link

Cos I use specials, thats also wat Sonarr uses as that (I use sonarr as auto rename for this).
Als Kodi uses that as default.

Kodi don't have any default folder names for seasons or episodes. For Kodi it's not important how you call a folder, the regex to get the season and episode number will only read the file name.

Cos as it stands this way Season 0 gets an error with Kodi Interface.

The Kodi Interface works without any error for special sesons. Kodi and Ember use "s0" to tag specials sesaons (also all scraper seources).