"Probability score": 0.8

"Question improvement suggestion": Please provide more information about the steps you have taken to resolve the issue, the exact version of Trados Studio you are using, and any recent changes to your system or software.

In the meantime, based on the information you have provided, here is a suggested answer to your question:

Hello,

The error message you're encountering usually indicates that the API key you're using is not valid. Here are some steps you can take to resolve this issue:

Step 1: Verify your API Key

Ensure that the API key you're using is correct. You can do this by logging into your DeepL account and checking the API key there.

Step 2: Update Trados Studio

Make sure your Trados Studio is up-to-date. You can check for updates within the application (Help > Check for updates).

Step 3: Update the DeepL Plugin

Ensure you have the latest version of the DeepL plugin installed. You can uninstall the current version of the plugin under Add-Ins > RWS AppStore > Installed plug-ins, then download the latest version from the RWS AppStore and install it.

Step 4: Check your DeepL Subscription

If the problem persists, ensure you have a DeepL Pro Advanced or Ultimate subscription, as the API key is only available with these plans.

If you've followed these steps and are still encountering the issue, it may be a more complex problem that requires further investigation.

I hope this answer addressed your question. If not, please reject the answer, add the question improvement suggestion information, and click the RWS Community AI checkbox on the right to try again.

RWS Community AI