If I remove I get this error

# announcements

[pp.amorim]

If I remove I get this error

[wasyl]

That's because an empty block still returns Unit, and let requires an expression to be returned. Without else, there's no expression.
You can write else { Unit } to get rid of the warning, or use some other function that let, which doesn't require an expression, I think also would work for example

[pp.amorim]

Thank you!

[streetsofboston]

Pedro, you may be interested in this blog post I wrote.
“Let’s also apply a run with Kotlin on our minds” by Anton Spaans https://link.medium.com/e5Mzajo9EZ