Hello,
Try uninstalling the scenery then clearing BOTH cache folders present in %appdata%/Local & /Roaming. Afterwards, launch the manager in administrator mode and install again. Quadruple check that your community folder matches what the simulator has in the settings (I assume you have seeing as no issues with other addons?).
If all else fails, please reach out to our direct support for more hands-on help. https://inibuilds.com/pages/contact
Thank you