Well, as per the title. Watch your whitespace.
For example, I was getting this error on the checker and tried to figure out what is wrong with the reference name.

When you use expressions you have to type things in. This is where you have to extra careful.

It seams to look OK but in reality it’s a bit not OK, we just can’t see it straightaway.

There is an extra whitespace after the Get PNLM Delay. You can barely see it but it’s there.

And it may cost you some time and extra grey hair. Let’s remove it!

Happy days 🙂
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