Help Exception in thread "SelectorThread-50" - L2JAcis (Interlude

[Bubashka]

Exception in thread "SelectorThread-50" java.lang.NoSuchMethodError: java.nio.ByteBuffer.flip()Ljava/nio/ByteBuffer;
        at net.sf.l2j.commons.mmocore.SelectorThread.readPacket(SelectorThread.java:294)
        at net.sf.l2j.commons.mmocore.SelectorThread.run(SelectorThread.java:172)

Hi. Can someone help me to fix this issue? its L2JAcis (Interlude Client)

Edited January 19, 2020 by Bubashka

[TreVor]

bump i have this problem ;/