When uploading documents ( depending on the folder they must be in  JPG, PDF, DOC, DOCX, XLS, XLSX, TIFF formats) if the upload fails as below: 

It is likely there's a restriction on your system preventing access to our servers. We use Amazon Web Services for our data storage and management. Follow this link: https://s3.eu-west-1.amazonaws.com/ to test your connection. If the page fails to load you will need to contact your IT team to white label this site to allow access. 

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