Unsuccessful-http-call status=424

Hi folks,

I’m using Currant switches in SmartThings controlled through an integration with Home Assistant:

This was working beautifully until about a month ago when suddenly I began receiving this error from SmartThings:

"code": "UnexpectedError", "message": "unsuccessful-http-call status=424", "details": []

…which apparently indicates a missing or problematic server-side dependency. The strange thing is that the switch toggles as commanded, but the presence of the error causes any automations or scripts in Home Assistant involving these switches to abort, which has basically rendered them useless. The only thing I can think of is that I don’t have a SmartThings hub on the network, but as I mentioned this was previously working just fine without one. Does anyone have thoughts on this?

Thanks in advance.