ok thanks, i got another of your courses so might stick to that one

Try redownloading all the assets and the SBE mod. If that doesn't work, I don't know what will.

never unchecked

Make sure the assets are enabled as well.

i never deactivated, it worked last week

Make sure Sub Buildings Enabler is enabled.

For some reason. Some holes are cut in half. Especially the long holes

I saw that. Looks better than anything I could've done!

Look here: https://www.reddit.com/r/CitiesSkylines/comments/3zhixy/golf_course_behind_wip_tourist_area/

:)

You can always remove the trees in the asset editor

Great collection, only downside is that the Conifer trees look a bit out of place in my tropical map. But I understand that this is based on a real life golf course in that climate zone.