Hello,
The issue is probably connected to network settings, but first try resetting RealityCapture like a clean install. Hold down SHIFT and run RealityCapture. You should see a Reset window. Choose ‘‘Make it like a clean install’’ in the dropdown and click on Reset. RealityCapture will open again, and you will have to sign in.
Also please navigate to your Internet Explorer settings (regardless of which browser you actually use). Under its SECURITY tab you can find the TRUSTED SITES menu. Add https://www.capturingreality.com and https://capturingreality.com, and hit OK to apply. You can find the instructions here: https://support.capturingreality.com/hc/en-us/articles/115001485032-Inaccessible-webpage.
Also make sure that the communication with capturingreality.com and www.capturingreality.com is enabled on ports 80 (HTTP) and 443 (HTTPS) in your firewall.
Please make sure that you have the latest version of Internet Explorer (IE) installed.
When you open the page www.capturingreality.com in IE, is it displayed correctly? Does any script error appear?
Also, please, reset all zones zones to default level as it is on this image (there you can see the option for adding trusted sites):