ARMA III Server - won't download Steam workshop items - "Missing decryption key"

OS Name/Version: Debain 11

Product Name/Version: Halimede 2.4.0.10

Problem Description:

Not able to download Steam workshop items for ARMA III server.

Suspect this might be due to not being asked for Steam Guard code - was asked for username and password. Have attached partial (same error for each Steam Workshop ID so no need to repeat 43 times) of workshop_log.txt below.

[2022-11-03 00:28:01] Loading workshop items for 1 installed apps for user [U:1:9036366]:
[2022-11-03 00:28:08] [AppID 107410] Loaded workshop items in "/AMP/arma3/233780/steamapps/workshop" (0 installed, 0 needed)
[2022-11-03 00:28:08] [AppID 107410] Download item 893328083 requested by app
[2022-11-03 00:28:08] [AppID 107410] Starting Workshop download job (requested item 893328083 )
[2022-11-03 00:28:08] [AppID 107410] Detected workshop change : changed cached item 893328083, new manifest 4860435509162875270
[2022-11-03 00:28:09] [AppID 107410] Update canceled: Failed to initialize depot 107410, manifest 4860435509162875270 (Missing decryption key) (Missing decryption key)
[2022-11-03 00:28:09] [AppID 107410] Download item 893328083 result : Failure
[2022-11-03 00:28:09] [AppID 107410] Download item 893346105 requested by app
[2022-11-03 00:28:10] [AppID 107410] Detected workshop change : changed cached item 893346105, new manifest 6952869424536480120
[2022-11-03 00:28:10] [AppID 107410] Starting Workshop download job (requested item 893346105 )
[2022-11-03 00:28:10] [AppID 107410] Update canceled: Failed to initialize depot 107410, manifest 6952869424536480120 (Missing decryption key) (Missing decryption key)
[2022-11-03 00:28:10] [AppID 107410] Download item 893346105 result : Failure
[2022-11-03 00:28:11] [AppID 107410] Download item 1135539579 requested by app
[2022-11-03 00:28:11] [AppID 107410] Starting Workshop download job (requested item 1135539579 )
[2022-11-03 00:28:11] [AppID 107410] Detected workshop change : changed cached item 1135539579, new manifest 7161780783701125209
[2022-11-03 00:28:11] [AppID 107410] Update canceled: Failed to initialize depot 107410, manifest 7161780783701125209 (Missing decryption key) (Missing decryption key)
[2022-11-03 00:28:11] [AppID 107410] Download item 1135539579 result : Failure
[2022-11-03 00:28:11] [AppID 107410] Download item 1135541175 requested by app
[2022-11-03 00:28:11] [AppID 107410] Starting Workshop download job (requested item 1135541175 )
[2022-11-03 00:28:12] [AppID 107410] Detected workshop change : changed cached item 1135541175, new manifest 7580114791765156861
[2022-11-03 00:28:12] [AppID 107410] Update canceled: Failed to initialize depot 107410, manifest 7580114791765156861 (Missing decryption key) (Missing decryption key)
[2022-11-03 00:28:12] [AppID 107410] Download item 1135541175 result : Failure
[2022-11-03 00:28:12] [AppID 107410] Download item 893349825 requested by app
[2022-11-03 00:28:12] [AppID 107410] Starting Workshop download job (requested item 893349825 )
[2022-11-03 00:28:12] [AppID 107410] Detected workshop change : changed cached item 893349825, new manifest 3142599753270359676
[2022-11-03 00:28:13] [AppID 107410] Update canceled: Failed to initialize depot 107410, manifest 3142599753270359676 (Missing decryption key) (Missing decryption key)
[2022-11-03 00:28:13] [AppID 107410] Download item 893349825 result : Failure

Steps to reproduce:

  • Create new ARMA III instance
  • Let it install
  • Add 1 or more Workshop ID’s via UI (SteamCMD and Updates)
  • Update instance to try and download workshop items

Actions taken to resolve so far:

Have tried to delete and recreate the instance, but this had no effect. Taken a look at the logs, seems there is a “Missing decryption key” - at a loss.

Would really appreciate some assistance with this