I was getting load of errors being thrown in the logs with the final being
“dark-sky-weather-card.js?v=9:17:9 TypeError: hass.config.core is undefined”
I found this here.
After making the changes to the JS code using find and replace ( find hass.config.core.unit_system replace hass.config.unit_system [all]) it solved my problems and everything is working as designed.
Running 0.82.1