TypeError: Cannot read properties of undefined (reading 'properties')
AI: 64 message:"One of telemetry initializers failed, telemetry item will not be sent: TypeError" props:"{exception:[object Error]{ stack: 'TypeError: Cannot read properties of undefined (reading 'properties')\n at http://localhost:60016/main.js:30818:48\n at _self.
This exception is coming from one of your telemetry initializers.
You are referencing the properties property from the event, however, for the event that is being processed the parent of the this object does not contain the properties.
You need to be aware that a telemetry Initializer is called for every event that passed through the system and not all events have all of the properties. I'm guessing that this is probably an exception event as they tend to be rare and don't contain the event.data (which is where I'm guessing you are attempting to access the properties from). ie. event.data.properties.
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