It has been brought to our attention that students are frequently getting errors when uploading their files to an EC form. Please observe below a message from our multisite team (the people behind the platform):
While you are submitting EC you may need to upload your files in the form for supporting purposes. You can choose multiple files in a variety of formats, after you upload your chosen files, you will be presented with a list of your uploaded files, alongside a cross icon next to it which you can click to remove the uploaded files.