## Long story short
Problem lies in a mismatch between the documentation of multipart [here](https://docs.aiohttp.org/en/stable/multipart.html#aiohttp-multipart) and the actual code execution aroun…
Anko is preventing me to update to Kotlin 1.3 stable.
Using Anko Courotines with Kotlin 1.3 results in a crash when executing the app:
```
java.lang.IllegalArgumentException: Must be used with D…