Hey there @BellaBELL145, I'm sorry to hear you're having difficulty downloading Horizon Worlds. Let's try a few standard trouble shooting steps and see if we can't get you up and running in the metaverse.
Firstly, make sure these criteria are met:
If you meet all these requirements and are still are unable to download the app doublecheck a few more things:
If you've went through all these steps and are still experiencing trouble, please open a ticket with support: