I updated to 1.15 and started a new world. But I couldn't find any Natura items, such as berries and trees. Including in NEI. But Natura is listed as being active in the launcher.
Ok I checked the configs and they seemed ok, then looked in the mod folder and Natura_1.5.2_2.1.5.1 is actually 0 bytes...
Seems like someone messed up when uploading the pack .