Saying "Missing A Temporary Folder" if I attempt to upload an image

I am new to WordPress and do not understand any of the coding language, but I need some help. I called GoDaddy (they are my host) and they couldn’t do anything to help me out.

Every time I upload an image an error page comes up saying I am “missing a temporary folder”. I have no clue what this means. I did switch from Windows to Linux (whatever that means) yesterday, and this is when this issue started. Everything was fine before that switch, but I had to do that switch in order for my permalinks to work right. (long story).

Does anyone know why my blog is doing this? Or how I can fix this? I can’t even upload a new header on the top of my blog. It lets me use my old one, and lets me us old images that are in my media library, but when I try to upload a new image it gives me the error code.
Please, help a mama out! 🙂 🙂 🙂 If you could make me a video and post it that would be super awesome! I do much better with step by step instruction.

My website is http://themissfitmama.com
I don’t know if you need that info but I’m just trying to give everything I can to get help.

Thanks in advance. <3