Why Is DeepSeek Harness Installed but Not Ready to Run a Task?

Start with the boundary that actually failed

You have installed something, a window has appeared, and the task still will not start. Before reinstalling, write down the last thing that worked. Did the application open? Could you select a model? Did your first request produce an error? Those observations give you a narrower problem than “DSH is broken.”

DeepSeekDSH (opens in a new tab) organizes public installation and troubleshooting guides for this stage. Its about page (opens in a new tab) explains the project’s independent status and distinguishes documentation review from hands-on testing. This article is a diagnostic checklist based on public documentation, not a report of a completed installation.

Keep a short record of your operating system, installation route, installed version and exact error. For a terminal launch, note what you ran. Remove credentials and personal paths before sharing that record.

1. Check your DeepSeek Harness setup path and version

Use instructions that match the installation you actually have. A desktop package and a command-line launch can lead to similar-looking interfaces while requiring different startup checks. Do not combine fragments from several tutorials just because their screenshots look familiar.

The official repository (opens in a new tab) describes Harness as developer-preview software and warns of compatibility-breaking changes. That makes version matching part of DSH troubleshooting, rather than a detail to investigate only after everything else fails.

If the application never starts, stay with the startup error. If it opens and rejects a request, move to model configuration. Reinstalling immediately changes your baseline and may leave the original cause unexplained.

• Record whether you used a desktop package, a packaged command-line release or a source checkout.
• Compare the guide’s applicable version with yours before following version-specific advice.
• For a local web launch, use the address printed by that launch rather than assuming an old bookmark is correct.

2. Separate a missing credential from an unavailable model

A provider credential and a model choice solve different problems. In the official model configuration guide (opens in a new tab), MISSING_CREDENTIAL points to provider authentication, while UNKNOWN_MODEL points to an unconfigured model. Diagnose the message you have.

Check the intended provider first, then confirm that your current model belongs to that provider’s configuration. For a custom endpoint, use its own documented model identifier. A model name copied from another service may not identify anything your endpoint serves.

Enter secrets only through the intended local configuration flow. Never paste a real key into a prompt, an article comment or a public support report. Inspect screenshots before uploading them. Installing the application does not establish that your provider account is ready; review account access separately, without assuming any included allowance.

3. Check workspace selection when the input stays disabled

An interface can load before its session is ready. The official Web UI guide (opens in a new tab) explains that a fresh interface needs an explicitly selected workspace. Starting the process inside a folder does not complete that selection.

Check the displayed workspace and the selected provider and model together. The official provider guide also documents blocked input when a saved default refers to a deleted provider. This is a useful reason to inspect the current selection instead of repeatedly refreshing.

Choose a small test folder containing only expendable material. Read its path carefully, especially when several folders have similar names. Do not use your home folder as a convenient shortcut.

4. Treat startup and port errors as a separate branch

The DeepSeekDSH error center (opens in a new tab) has separate entries for credentials, models, occupied ports, inaccessible local pages and disabled input. Use it to find the relevant public guide, then check any instructions against your version and operating system.

If the reported problem concerns a port, changing a model is unlikely to clarify it. Identify the process or operating-system restriction involved before stopping anything. Do not terminate an unfamiliar process merely because a generic tutorial suggests freeing a port.

Likewise, do not weaken system security settings as an exploratory fix. On a managed computer, an administrator may need to explain a restriction. Keep the original error and record each change so that you can undo an unsuccessful experiment.

5. Verify one small task before adding more access

The official safety notice (opens in a new tab) says Harness has not undergone a security audit and should not be treated as production-ready. It recommends minimal privileges and a disposable environment. Approval prompts are not a guarantee of isolation.

A deliberately small test makes the result easier to judge. Use an isolated test environment without valuable files or secrets, then work through this sequence:

• 1. Create a disposable folder with a short, non-sensitive text file.
• 2. Select that folder and a configured model. Review the active permissions.
• 3. Ask for a read-only description of the file, explicitly excluding edits and commands.
• 4. Check the reported result and inspect the folder yourself. Record any error before changing another setting.

When this checklist helps, and when to escalate

This approach is useful for a first session, an unclear setup failure or a configuration that stopped working after a change. It is less useful for diagnosing a specific plugin defect, a provider-side incident or an organizational access policy without further evidence.

If the same error persists, prepare a short redacted report: version, operating system, installation route, last successful step, exact failure and one attempted fix. Explain what you expected and what happened. Leave out private code and account secrets.

Conclusion: finish with a result you can inspect

A useful DeepSeek Harness setup check ends with a small, observable result or a precise unresolved error. Follow the failing step, preserve your working baseline and add integrations only after the basic session behaves as expected.