If you are having problems with our website, specifically uploading, it is a good idea to clear your browser cache/cookies. It's a pretty easy process. Here's how on a Mac.
With Google Chrome open, Click on Chrome and select Clear Browsing Data
A pop up window will appear, where you can select what you'd like to clear. I recommend the History/Cookies and Cache.
Click Clear Data to clear what you have selected.
Go to Safari/Preferences
Once the Preferences window opens, click on Advanced and make sure "Show Develop menue in menu bar" is checked.
Now from the Menu Bar, you can select Empty Caches
With Firefox open, go to Firefox/Preferences
A separate window will open. Click on Privacy
Once Privacy is Open, click on Show Cookies
You'll then see your Cookies listed. Click Remove All to remove