error at pio train

[Alexey Grachev]

Hello,

starting pio train gives me this error:

Exception in thread "main" java.lang.NoSuchMethodError: 
org.json4s.ParserUtil$.quote(Ljava/lang/String;)Ljava/lang/String;


tried another versions of this json4s, no luck. Using spark 2.4.0


Does someone know the fix?

thx,

Alexey


ps. Btw, we are not in 1990-ies anymore, maybe at least slack channel 
instead of the stone age "mailing lists"?