iCloud "Low Disk Space", not syncing photos
I have a 16GB iPhone 5 that is completely jammed full of just the barebones essential apps and photos I need. I've deleted everything I possibly can. Unfortunately I'm not eligible for an upgrade to a larger phone until August. I'm hoping the iCloud Photo Library with the Optimize iPhone Storage setting can help free up some space. Here's my problem:
I enabled the iCloud Photo Library, and the Optimize iPhone Storage setting. I have the 20GB iCloud storage plan, and roughly 7GB of photos on my phone, so plenty of space. In the iCloud photo settings tab, underneath the iCloud Photo Library option, it tells me "Low Disk Space - 2536 Items to Upload". Nothing ever syncs, nothing is uploaded, my iCloud storage space still says 20.0 GB available, and my local photo storage hasn't shrunk at all. Why isn't it syncing? What am I missing?