Hi Everyone,
I can not add any new card via GUI for a while, since clicking on + ADD CARD gives an empty list:
All previously added cards work well and all can be edited via visual and/or code editor.
Have anyone experienced this?
Any idea how can I restore the card list?
That’s most likely caused by caching. Try refreshing the webpage with ctrl+F5.
That was my first thought too, but it didn’t solve the problem.
No, still the same situation. 
I plan to reinstall HA from scratch.
Same happen to my HA anyone found a way to fix it?
Same here. After installing and messing with Google Calendar integration and some HACS addon.
upd: deleting Google Calendar shown through Atomic Calendar Revive card from the dashboard helped. I can now add cards through GUI.
I’ve got the same issue… I have Garbage Collector installed through hacks and that uses the Google Calendar, maybe that’s what’s breaking it?
Was anyone able to get this fixed?
Same here after installing Google Calendar
worked for me, thanks
Jumping in here. My HA just started doing this same exact thing. I’ve tried multiple browsers, other devices, multiple restarts. I don’t have Google Calendar… so it’s something else.
Anyone ever figure this out? I am experiencing the same problem its quite a nuisance and I used to have some of the aforementioned modules but they have been long gone. Anything else seem to be causing these problems? Thanks!
I just had it happen again. Last time I thought it was because of the Sections experimental view. I tried cut / pasting cards but it didn’t work, which is what fixed it last time for me.
