Please provide your hub model (C7, C8, etc.) and its platform version from Settings>Hub Details.
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C8 2.3.9.143
Getting this error after one test alert ( which took about 15 min to go from activation to hearing the test alert. Also in the logs the warning says device caused hub overload - the device in the log is the google mini used to broadcast the alert. The google mini is not used for anything else.