When TwitterPublish activity of TIBCO ActiveMatrix BusinessWorks Plug-in for Twitter is executed, it fails to connect to the Twitter server and returns the following exception.​ See attached snapshot. 

401:Authentication credentials (https://dev.twitter.com/pages/auth) were missing or incorrect. Ensure that you have set valid consumer key/secret, access token/secret, and the system clock is in sync.
message - Invalid or expired token.
code - 89
.
    at com.tibco.plugin.twitter.activities.TwitterPublishActivity.postTweet(TwitterPublishActivity.java:209)
    at com.tibco.plugin.twitter.activities.TwitterPublishActivity.eval(TwitterPublishActivity.java:98)
    at com.tibco.pe.plugin.Activity.eval(Unknown Source)
    at com.tibco.pe.core.TaskImpl.eval(Unknown Source)
    at com.tibco.pe.core.Job.a(Unknown Source)
    at com.tibco.pe.core.Job.k(Unknown Source)
    at com.tibco.pe.core.JobDispatcher$JobCourier.a(Unknown Source)
    at com.tibco.pe.core.JobDispatcher$JobCourier.run(Unknown Source)
<?xml version="1.0" encoding="UTF-8"?>

<Data>
    <ns0:TwitterAPIException xmlns:ns0="http://schemas.tibco.com/bw/plugins/twitter/TwitterExceptions">
        <msg>401:Authentication credentials (https://dev.twitter.com/pages/auth) were missing or incorrect. Ensure that you have set valid consumer key/secret, access token/secret, and the system clock is in sync.
message - Invalid or expired token.
code - 89
.</msg>
        <msgCode>BW-TW-100401</msgCode>
    </ns0:TwitterAPIException>
</Data>