Are you collecting data via the nicla_sense_ingestion.ino sample project, and following the settings this this guide Arduino Nicla Sense ME | Documentation? What frequency setting are you using and what version of the firmware?
Please share any settings you are using for the .ino and edge-impulse-data-forwarder. We will try to reproduce and assess here. Thanks!
500 - “too many notifications in the NOTIFY queue”
It seems a general issue with our ingestion service. An internal ticket is opened.
We will let you know when it will be fixed. Thank you for reporting it.