Same here, can’t get it working again.
Mine isn’t working at the moment either 
I am also unable to login
Same here, getting same “failed to connect” error when trying to login via the integration.
All - Check this out:
“SMT Current Reading” is the name of the entity with your meter reading.
I just tested the HASS version and it works!! On top of that I can now get rid of MQTT which I only installed for this integration. When you import it into Node Red remember to configure the Credentials node and then for the first go around, enable all the debug nodes. After a few PENDING messages, you should get a reading:
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I’m using it now too, and it is working!