Unfortunately, the underlying service that this extension depends upon has stopped working. This impacts English 100% of the time, the extension continues to work intermittently for other languages.
I recommend you un-install this extension and use one of the other options such as Code Spellchecker in it's place. I'm publishing this update to help users find a valid migration path.
To highlight this to existing users upon activating the extension you will see a new warning message:
If you choose to continue to use the extension, click Don't Ask Again in the warning message. Which will create a setting in your VS Code User Settings to suppress the message from coming up again. Delete that setting "spell.StopAsking": true when you do finally uninstall the extension.
I do intend to un-publish the extension in the next month so to prevent new users from finding it when searching for a spell checker.
When this happens any local copy you have will continue to work. There will also be a .VSIX file in the extension repository should you want to get it and load it into VS Code.
If you are still using the extension and wish to review the full user guide click here.
A complete CHANGELOG is maintained here.
Added guidance to un-install extension based on instability of the underlying service with a suggestion to leverage another one of the options out there.