Hi,
The link ("Process and translate speech with Azure Cognitive Speech Services") works fine here, have you tried the following:
- Restart browser
- Clear browser cache
- Try another browser
- If possible, try another computer
If you still have an issue, you may ask/report it by creating a thread here:
https://trainingsupport.microsoft.com/en-us/tcml/forum/tcml_mat
Best regards,
Leon