Malformed file. Source files must be encoded with UTF-8

1

source/states/OutdatedState.hx:1: character 1 : Malformed file. Source files must be encoded with UTF-8.
source/states/OutdatedState.hx:1: character 1 : Malformed file. Source files must be encoded with UTF-8.
source/states/OutdatedState.hx:1: character 1 : … For optional function argument ‘nextState’