The page just never seems to load for me, just shows a blank page. However, I did just try another browser (Microsoft Edge) and that worked. Chrome is still giving me issues.
I've had similar issues with Heritage from time to time. When I clear my browsing data it seems to resolve itself.
I've just done that on both my mobile device and laptop computer and I can now successfully login using both devices. Thanks for the tip. I just wish I wouldn't have to do it from time to time. Oh well, better than not having access.