Problem With Spelling Feature

Help
#1

I’ve had to scrap my Mac Mail as it apparently has a problem with my Mac OS, so I’ve installed Mailspring.

It seems to work okay, but the spelling feature doesn’t appear to be working.

Can anybody shed some light on this?

Thanks.

#2

Hey, did you get it working? Not working for me either.

#3

Spellcheck also not working for me (Windows 10).