#8356 403, message='Invalid response status', url='wss://speech.platform.bing.com/consumer/speech/synthesize/readaloud/edge/v1

This is caused by Microsoft changing the Edge-TTS authentication logic. Your version (v3.79) is too old and does not include the fix.

Solution:

1. Download and install the latest v4.16 patch package (or full package) from the official download page and overwrite it into your existing installation folder.

   • If you are using source deployment (macOS/Linux/Windows source), run:

     uv add git+https://github.com/rany2/edge-tts.git

     If it fails, first run uv remove edge-tts, then run the command above again.

2. After upgrading, if you still get occasional failures, go to Menu → Tools/Options → Advanced Options → Dubbing, set EdgeTTS concurrent threads to 1 and pause after each dubbing request to 5–10 seconds to avoid rate-limiting.
3. If a proxy is enabled and you get a proxy-related error, create an empty file named edgetts-noproxy.txt in the software root directory to force Edge-TTS to bypass the proxy.

Please refer to the related documentation:

• Edge-TTS 403 fix (release notes)
• Edge-TTS channel
• FAQ