I'm trying to run Unity in "headless" mode (using xvfb) on a Linux server (Ubuntu 18.04.4). I've manually activated the editor (using .alf/.ulf files), but now when I try to run the build command, I get an error that it can't connect to the package manager. Here's the console output: Code (CSharp): [LicensingClient] ERROR Failed to connect to local IPC [Licensing::Module] Failed to connect to channel: LicenseClient-nick [Licensing::Module] Successfully launched the LicensingClient [Licensing::Module] Successfully connected to LicensingClient on channel: LicenseClient-nick [SignatureVerifier] Application signature verification not supported on this platform. [Licensing::Module] Successfully launched and connected to LicensingClient Entitlement-based licensing initiated [LicensingClient] Licenses Updated successfully in LicensingClient LICENSE SYSTEM [20201126 15:59:24] Next license update check is after 2020-11-27T14:50:31 [Licensing::Module] Serial number assigned to: "SB-XYZ"\n[Package Manager] Server::Start -- Port 50602 was selected COMMAND LINE ARGUMENTS: /unity/editors/folder/2019.4.0/Editor/Unity -nographics -quit -batchmode -executeMethod=BuildProcess.BuildMethod /my/project/folder Using Asset Import Pipeline V2. DisplayProgressbar: Unity Package Manager Rebuilding Library because the metadata folder could not be found! Adding genesis user token [Package Manager] Server::CheckExitCode -- Server stopped with exit code `9` [Package Manager] PackageManager Server::Start -- Process restart attempt #2 [Package Manager] Server::Start -- Port 43639 was selected [Package Manager] Done resolving packages in 3.49s seconds Failed to resolve packages: Cannot connect to Unity Package Manager local server. No packages loaded. A re-import of the project may be required to fix the issue or a manual modification of /home/nick/gvh-main/Packages/manifest.json file. I've tried setting UNITY_NOPROXY=localhost, but that doesn't seem to have changed anything. Is there any reason the Package Manager would be unreachable, and how can I fix that to continue with the project build?