LO Writer autocorrect not working

I’m on 6.4. When I upgraded last time I lost autocorrect in Writer. I’m finally asking about it. I’d like it to replace “b/c_” with “because_”, where “_” represents a blank. Please help me get it working.

Previous question

What do you mean by a blank?

You could enter b/c in the Replace field and because in the With field. If you needed a bigger space you could use an m-space U+2003 instead because