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Hello

Please check the following:

1. Generate a new API key on OpenRouter.

2. In Thaluna settings, delete the old key completely and paste the new one.
   Make sure you paste the entire API key exactly as OpenRouter gives it, not just part of it.

3. Click the button next to the API field to reveal the key and verify it looks correct.

4. 
   

5. Click Save / OK, then fully restart Thaluna.

If the problem still happens, please check the stored configuration manually:

1. Press Win + R

2. 

3. Type:

%localappdata%\Thaluna\secrets

1. Open openrouter_api_key.json

2. Verify that the API key stored there matches your current OpenRouter key exactly.

This error usually means one of the following:

• the API key is missing, incorrect, or saved incorrectly

• the app is still using an old/invalid key

If the steps above still don't fix the issue, please try one quick test:

Temporarily switch to a different internet connection (for example your phone hotspot) and test Thaluna again.

Sometimes a VPN, proxy, firewall, or antivirus web protection can interfere with API authorization requests.

Using a different network for a quick test can help confirm if the issue is network-related.