Cannot connect to hassio.local

I have not been able to connect to http://hassio.local:8123 recently. I am new to Home Assistant and had been running version 0.103 on a RPi3B+ for about 2 weeks. When I try to connect I get the error that the server cannot be found. My RPi is on, connected by ethernet, and I have tried turning it off and restarting it. Any ideas for next steps are very welcome. Thanks.

I have had this happen to me. Try: http://hassio.localdomain:8123

I’m not sure if the change was on hass.io or Windows, but machines I previously could access with just .local (or no extension) I cannot, and it seems .localdomain is the “more proper” way to do it.

Thanks no luck with that either.
I’m thinking I might need to reinstall at this point if I can’t access.

Still having a connection problem. I reflashed Hassio to SD today, connected by ethernet, gave it time to set up, and I still can’t connect. I can see it using Fing and I’ve also tried connecting using the IP address:8123 with no success. I have not changed anything on my router since it last connected. Any ideas why I can’t connect are very welcome. Thanks.