> ## Documentation Index > Fetch the complete documentation index at: https://docs.galileo.ai/llms.txt > Use this file to discover all available pages before exploring further. # Troubleshooting > Common errors and how to recover. This page covers the most common errors users hit and what to do about them. If you're stuck on something not listed here, reach out via the [Galileo support channels](/references/faqs/faqs). ## Account ### Can't sign in You see **Invalid email or password** on the sign-in page. | Likely cause | What to try | | --------------------- | ---------------------------------------------------------------- | | Wrong password | Click **Forgot your password?** on the sign-in page to reset it. | | Account doesn't exist | Click **Create account** to create an account. | | Typo in the email | Re-check the email — case matters in some setups. | If you reset your password but still can't sign in, the reset email may not have arrived. Check spam, and confirm the email matches your Luna Studio account. ## Integrations ### Save changes button is disabled The modal won't let you submit. | Likely cause | Fix | | ----------------------------------------- | ------------------------------------------------------------------------------ | | A required field is empty | Fill in every field marked required. | | JSON in a code-editor field doesn't parse | The editor highlights the offending line. Common: trailing comma, smart quote. | | Disclaimer switch isn't toggled on | Some providers gate save behind the "I acknowledge..." switch. | ### Provider returns 401 / unauthorized Validation passes when adding the integration but runs fail with provider auth errors. | Likely cause | Fix | | -------------------------- | ----------------------------------------------------------------------------------------------------------------- | | Stale API key | [Update](/luna-studio/ui/integrations/overview#update-or-remove-an-integration) the integration with a fresh key. | | Wrong region (Azure / AWS) | Confirm the resource is in the region you specified. | | Insufficient quota | Check your provider's quota dashboard. Some providers return 429 instead of 401. | ### Vertex AI: GCS uploads fail You enabled **Support file uploads** but uploads to your bucket fail. | Likely cause | Fix | | --------------------------------- | ---------------------------------------------------------------------------- | | Service account lacks permissions | Grant `Storage Object Creator` (or higher) on the bucket. | | Wrong object path prefix | Defaults to `galileo-uploads`. Make sure the prefix matches your IAM policy. | | Bucket name typo | Bucket names are case-sensitive in some setups. Double-check. | ### AWS: Assumed role fails You picked **Assumed Roles** but Luna Studio can't assume the role. | Likely cause | Fix | | -------------------- | ------------------------------------------------------------------------------------------------------------------- | | Trust policy missing | Add Galileo's account principal to the role's trust relationship. (See AWS docs from the integration modal footer.) | | External ID mismatch | If you set an external ID, confirm it matches what Luna Studio sends. | | Wrong region | The role must exist in the region you specified. | ## Datasets ### Validation error: "Missing column" You see `Missing column "label"` (or `"input"`) after adding a dataset. | Likely cause | Fix | | ---------------------------- | ------------------------------------------------------------------------------------- | | Column not in CSV/JSONL | Add the column to the file and re-add the dataset. | | Column named differently | Rename to the literal `input` and `label` keys — Luna doesn't auto-detect. | | Training logs are unlabelled | Use **Add training logs** in Step 3. Luna Studio will label the logs before training. | ### Validation error: "Could not fetch URL" Luna couldn't pull the file from the URL you gave it. | Likely cause | Fix | | ------------------------ | -------------------------------------------------------------------------------- | | URL requires auth | For `s3://` use AWS integration; for `gs://` use Vertex AI with file uploads on. | | URL returns 404 | Open the URL in a browser to confirm it serves a file. | | Content type unsupported | Re-host as `.csv` or `.jsonl` and use a direct link. | ### Generated dataset doesn't look right You ran **Generate from test set** and the samples are repetitive, off-topic, or mislabelled. | Likely cause | Fix | | ------------------------------------ | -------------------------------------------------------------------------------- | | Test set seeds aren't representative | Add more diverse rows to the test set, then regenerate. | | Generation model too small | Switch to a larger available model from one of your configured providers. | | Metric prompt is ambiguous | Clarify the prompt; click **Regenerate** with the "Provide own feedback" reason. | ## Runs ### Run failed | Failure reason | What to do | | ---------------------------------- | ---------------------------------------------------------------------------------- | | Out-of-memory on base model | Switch to **Luna Small**, or shrink the training set (regenerate with fewer rows). | | Training failed after N epochs | Often a transient compute issue. Re-launch with the same config. | | Provider error (during generation) | Re-check the integration that backs the generation model. Re-launch. | | Validation error on linked dataset | The dataset changed since launch (Galileo source updated). Re-add and re-launch. | ### Register metric fails with duplicate name The Galileo metrics store already has a metric with that name. * Pick a different name in the [Register metric modal](/luna-studio/ui/runs/register-metric). * Or, delete the existing metric in the [Galileo metrics store](/concepts/metrics/overview) first, then register again. ### Stuck in **Queued** If a run sits in **Queued** for more than a few minutes, the most likely causes are: * **Heavy load.** Luna provisions training capacity per region. Wait a few more minutes. * **Integration removed.** If the integration backing the metric template was removed after launch, the run can't allocate. Re-add the integration and launch a new run. If neither applies, contact Galileo support. ## Where to go next Common questions about how Luna Studio works. End-to-end walkthrough.