Unknown exceptions without any details

Hello. I am using workers with durable objects and the websockets hibernation API and alarm. In my worker, there are 5 DOs, all with alarms. Each alarm is wrapped in a try {} catch (e) {console.error(serializeError(e))}. In the logs, I see the following:

{"Entrypoint":"","Event":{"ScheduledTimeMs":1715543247236},"EventTimestampMs":1715543247237,"EventType":"alarm","Exceptions":[],"Logs":[],"Outcome":"exception","ScriptName":"big-auth","ScriptTags":[],"ScriptVersion":{"ID":"0657068e-35de-4008-aa12-5f551fd748b6","Message":"","Tag":""}}
{"Entrypoint":"","Event":{"ScheduledTimeMs":1715543194608},"EventTimestampMs":1715543194610,"EventType":"alarm","Exceptions":[],"Logs":[],"Outcome":"exception","ScriptName":"big-auth","ScriptTags":[],"ScriptVersion":{"ID":"0657068e-35de-4008-aa12-5f551fd748b6","Message":"","Tag":""}}

I would like to understand where the error occurs.