hoplite: Upgrading from 1.4.9 to more recent versions throws NoSuchElementException

I’ve tried upgrading from 1.4.9 to 1.4.10 and above, but I get the following stacktrace:

java.util.NoSuchElementException: List is empty.
        at kotlin.collections.CollectionsKt___CollectionsKt.first(_Collections.kt:212)
        at com.sksamuel.hoplite.decoder.DataClassDecoder.safeDecode(DataClassDecoder.kt:116)
        at com.sksamuel.hoplite.decoder.NullHandlingDecoder$DefaultImpls.decode(Decoder.kt:85)
        at com.sksamuel.hoplite.decoder.DataClassDecoder.decode(DataClassDecoder.kt:28)
        at com.sksamuel.hoplite.ConfigLoader.decode(ConfigLoader.kt:400)
        at com.sksamuel.hoplite.ConfigLoader.loadConfig(ConfigLoader.kt:386)
...

I haven’t narrowed what in our config is causing this as yet, but if I do, I’ll update the issue with the details.