Hi,
This morning, just after 118.3 update I did a server restart:
2020-11-24 14:05:58 WARNING (MainThread) [homeassistant.loader] You are using a custom integration for hacs which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant.
And now no HACS anymore and so almost nothing working in Lovelace 
Help !
Thank you
Have you restarted again? sometimes it happens that HACS does not start
Yes at first that was what I did, then:
I replaced HACS folder by a just downloaded 1.6.2 (I don’t know what was my installed version), restart and now all is working again.
Mine has also crashed on 118.3, but it had nothing to do with HACS.
I got a TLS issue with Nabu Casa and the whole system bricked shortly after and the cloud option within the config section of the UI was missing.
I then rebuilt from scratch and all was well until I linked my account again.
I’m going to rebuild again today without Cloud to see I can get everything back on line - if anyone wants the logs let me know