Cant download

So I had snapchat and had to delete it to free up space. I go to download it and it wont let me. I have 2GB space open and when I go to download it the blue bar wont move at all. It wont even appear on my home screen. I love snapchat I use it every day I have plenty of streaks. Please fix this

Bape_supreme_thrasher about Snapchat, v10.14.1.0