Token Exception error

Hi,
I'm encountering token exception error in Java client and refresh/restart/clear cookies isn't helping.

error log:
KiteException
com.zerodhatech.kiteconnect.kitehttp.exceptions.TokenException
at com.zerodhatech.kiteconnect.kitehttp.KiteResponseHandler.dealWithException(KiteResponseHandler.java:48)
at com.zerodhatech.kiteconnect.kitehttp.KiteResponseHandler.handle(KiteResponseHandler.java:20)
at com.zerodhatech.kiteconnect.kitehttp.KiteRequestHandler.postRequest(KiteRequestHandler.java:85)
at com.zerodhatech.kiteconnect.KiteConnect.generateSession(KiteConnect.java:180)



Can you please help. Thanks