From ST Support:
Hello John,
Thank you for contacting Samsung SmartThings Support.
I’m writing this in regards to your query on SHM server error. Apologies for the inconvenience.
This is to inform you that we are currently experiencing an outage which is preventing the app from making API calls to the ST Cloud which results in server errors. Our Engineers are actively working on this situation. There are no workarounds until the issue is resolved, so please wait until the fix is complete which will take very short time. Kindly keep an eye on the https://status.smartthings.com page for updates on the issue. Meanwhile, your patience is highly appreciated.
Please get back to us for any further assistance. We are happy to assist.
Kind regards,
Arun
Samsung SmartThings Support