STDERR Error?

[ErgothStudio]

Hello, everyting okay?

Im trying to use EnjinCraft but are giving me this error;

[16:43:16 ERROR]: [EnjinCraft] [STDERR] SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". [16:43:16 WARN]: Nag author(s): '[Evan "Favorlock" Lindsay, Damien Gallagher, Tobias Drewry, Enjin Team]' of 'EnjinCraft' about their usage of System.out/err.print. Please use your plugin's logger instead (JavaPlugin#getLogger). [16:43:16 ERROR]: [EnjinCraft] [STDERR] SLF4J: Defaulting to no-operation (NOP) logger implementation [16:43:16 ERROR]: [EnjinCraft] [STDERR] SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

Someone know how to fix it? Im using the v1.1.2-SNAPSHOT to 1.18. Thanks!