when I try installing the update, it says "app not installed".
That's most likely because you don't have space. I got this error many times on my old phone.
Could also be the settings, maybe your phone doesn't allow installing apps from external sources
I don't think it's that. I have enough space and I'm able to download other FVS. The error only came with this update.
Then I guess uninstall the update you already have installed
I did. Still the same thing sadly. I'll just wait for next month's update and hopefully it will work then.
Ok. Sorry I couldn't help!