What kind of error message is this... a small popup window, or does it redirect to an error page? Are you using any browser plugins e.g. https everywhere? That particular plugin causes problems sometimes.
You could also try clearing your local storage for askmrrobot.com... in Chrome you do that by opening Developer Tools, go to Application tab, Local Storage in the tree, select our domain. Select everything (click on top entry, scroll to bottom, shift-click on last entery), then press the delete button at the bottom. Reload the web page -- see if that helps.