Solution 1:
It looks like you're writing code targeting aeson 2.x, but that you have aeson 1.x installed. Either upgrade (recommended), or use Text in place of Key there.
Data.Aeson import Key
Solution 1:
It looks like you're writing code targeting aeson 2.x, but that you have aeson 1.x installed. Either upgrade (recommended), or use Text in place of Key there.