• Clear your browser cache, and hard-refresh the page. Note that clicking the "Refresh" arrow on your browser bar is not a hard refresh. Here's how you can clear your cache through a hard refresh depending on your browser:

Google Chrome

• Windows users - hold the Ctrl key and then press F5 on your keyboard
• Mac users - hold the Cmd and Shift keys and then press R on your keyboard

Firefox

• Windows users - hold the Ctrl key and then press F5 on your keyboard
• Mac users - hold the Cmd and Shift keys and then press R on your keyboard

Safari (Mac)

• Go to Safari > Empty Cache, or hold the Opt, Cmd and E keys on your keyboard

Internet Explorer/Microsoft Edge (Windows)

• Hold down Ctrl and then press F5 on your keyboard

• Try using a different browser (e.g. Chrome)

• Ensure you are uploading files directly from your computer's hard-drive, and not from a USB or from a networked server

• Disable any browser extensions that may be running - the easiest way can be to try uploading from a new incognito window

• Check that your system clock on your computer is up-to-the-minute accurate 

• Try loading a single small file (under 5 MB) sometimes a network firewall can start blocking and limiting file sizes, even if it has historically allowed for larger file sizes

• Disconnect from your wifi network and tether your phone, then attempt the upload again. This helps to determine if the issue may be with your network

• Attempt to complete the same process and upload the same files on a different machine to help determine if the issue is with the current device configuration