Hello @LauraA1. I'm sorry that you're experiencing this issue when uploading your contacts. Is this happening after you select the file of contacts that you wish to upload? Sometimes, this can be the result of a browser issue so I'd like to suggest trying to upload your contacts in a different browser. If you are able to successfully upload them with a different browser, you may have a third-party plugin that is interfering with your account. See this FAQ for more information.