Uncaught TypeError after upgrading to HA 0.84.1

[serbani]

Checklist

• [X] I'm running the latest version of CustomUI (Update guide) or using a specific release that is not marked as "Broken".
• [x] I tried to force-refresh (Ctrl+Shift+R / Ctrl+F5) the browser
• [X] (Optional, but recommended) I'm using Chrome or tried to reproduce the feature on Chrome.

Chrome 70.0.3538.110

CustomUI version: 20180831

Home Assistant release (hass --version): 0.84.1

Problem-relevant Home Assistant log entries:

http://somehost:8123/local/custom_ui/state-card-custom-ui.html:27:15926 Uncaught TypeError: Class extends value undefined is not a constructor or null

Any errors from browser Javascript console: I've tried switching to the debug version but none of the instructions worked.

Uncaught TypeError: Class extends value undefined is not a constructor or null
    at Object.<anonymous> (dynamic-with-extra.js:10)
    at i (bootstrap:19)
    at bootstrap:68
    at bootstrap:68

What I observe: all cards are empty.

[alegiovannelli]

I also found the error after upgrading to the latest version. The error of visualization I found is only on my smartphone with the browser Chrome and also with the stock browser, on the desktop PC no errors and the visualization is normal.

The error: ERROR (MainThread) [frontend.js.latest.201812110] https://xxxxxxxx/local/custom_ui/state-card-custom-ui.html:27:15926 Uncaught TypeError: Class extends value undefined is not a constructor or null

I think the problem is in the mobile visualization of the Home Assistant frontend.

[andrey-git]

Fixed by release 2018-12-17