WPM Player fails to play Transactions after upgrade to 2020.2.4

Hi All,

Firstly I have a case open for this but no response thus far #00735055

After upgrading to 2020.2.4 we are no longer able to play transactions. Transaction playback is running locally on the orion server. The following log entry appears to be the culprite in the SEUM.Jobs log

2021-02-08 06:10:55,990 [STP SmartThreadPool Thread #24] WARN SolarWinds.SEUM.Jobs.FetchResultsController - Connection failure in agent job while connecting to server at https://localhost. Connection Status: ServiceNotResponding. Error: Location Not Responding.
2021-02-08 06:10:57,990 [STP SmartThreadPool Thread #23] WARN SolarWinds.SEUM.Jobs.PlaybackController - Connection failure in transaction job while connecting to server at https://localhost. Connection Status: ServiceNotResponding
2021-02-08 06:10:58,001 [STP SmartThreadPool Thread #24] WARN SolarWinds.SEUM.Jobs.AgentJob - Connection failure in agent job while connecting to server at https://localhost. Connection Status: ServiceNotResponding
2021-02-08 06:11:08,952 [STP SmartThreadPool Thread #24] WARN SolarWinds.SEUM.Jobs.PlaybackController - Connection failure in transaction job while connecting to server at https://localhost. Connection Status: ServiceNotResponding
2021-02-08 06:11:12,994 [STP SmartThreadPool Thread #24] WARN SolarWinds.SEUM.Jobs.PlaybackController - Connection failure in transaction job while connecting to server at https://localhost. Connection Status: ServiceNotResponding
2021-02-08 06:11:51,960 [STP SmartThreadPool Thread #24] ERROR SolarWinds.SEUM.Jobs.AgentDetailsController - Unable to get agent details from agent.

SWIS seems to be operating ok and we are not experiencing other issues at this time. We have anumber of solarwinds instances and all of them are exhibiting the same behaviour.

We have tried repairing WPM, reinstalling WPM etc as per the kb advice but no luck.

Advice/suggestions much appreciated.