echo-datachannels gets internal server error 500

Hi, I'm reaching out because I'm getting an Internal Server Error on the POST datachannels/new request in my app.. It looks like the provided example is throwing the exact same error. Here are the details:
request: {"dataChannels":[{"location":"remote","sessionId":"30562bf4ab2c011f289f6304c8aaf1fb150ba2f7e85a3e24d0aed6b0f292a0a4","dataChannelName":"channel-one"}]}
response:{"errorCode":"internal_error","errorDescription":"Backend error"}
cf-ray:
a1e400a5c8f8c04a-WAW

all started today, 20.07 at 18:00 CEST. all was working perfectly before.

Start by reproducing the POST /datachannels/new request from the provided example with the supplied payload and inspect the 500 response, including the CF-Ray value. Trace whether the failure is in the example or the backend; done means identifying the cause and confirming that the request no longer returns the reported internal error.

Written by the indexing model from the issue text.