\var\opt\carbonblack\psc\log will have the following error messages.
[2023-08-22 07:22:58.056353] [1018:1064] [E] SwUpgradeTool : GetUpgradeBits : Could not download sensor update; PscCommsError=ConnectionTimedOut; cancelling upgrade
[2023-08-22 07:22:58.056401] [1018:1064] [E] SwUpgradeTool : FailUpgrade : Software Upgrade process failed (Download Failure)
[2023-08-22 07:22:58.059383] [1018:1064] [I] SwUpgradeState : SetState : Persisted SwUpgradeState Failed
[2023-08-22 07:22:58.060992] [1018:1064] [I] SwUpgradeState : SetAgentVersion : Persisted SwUpgradeAgentVersion 2.14.0.1321525
[2023-08-22 07:22:58.061008] [1018:1064] [I] SwUpgradeTool : FailUpgrade : Upgrade mode cleared
[2023-08-22 07:22:58.061015] [1018:1064] [I] SwUpgradeThread : SendTelemetryEvent : Sending event for upgrade failure
[2023-08-22 07:22:58.064724] [1018:1064] [I] SwUpgradeThread : ThreadLoop : End of software upgrade process