How to resolve Gmail Spell Check Not Working?
Gmail Spell Check Not Working, as evidenced by the error message. Examine Google's status page to confirm the issue. You can check here to see how their various services are doing right now. You're forced to wait for Google to address an issue with the platform.
It's also possible that a temporary problem with your equipment has prevented your Gmail from longer checking spellings. As a result, you can restart the entire system. Any transient issues that are causing applications to malfunction will be fixed.