Splunk Add-on for Java Management Extension : [main] ERROR - Error executing modular input : null : java.lang.NullPoint

[RAYUDU_NARA]

I am using Splunk Add-on for JMX over the years but in sudden it stopped working and below is the error.

So then i have installed  latest version in different server and copied inputs, it's working well without any issues. 

Any idea? why it stopped working and why we are seeing below errors?

2021-04-25 05:51:45,043 - com.splunk.modinput.ModularInput -0 [main] ERROR - Error executing modular input : null : java.lang.NullPointerException
at com.splunk.jmx.InfoManager.isJMXAccount(Unknown Source)
at com.splunk.jmx.InfoManager.getAccounts(Unknown Source)
at com.splunk.jmx.JMXModularInputV3.doRun(Unknown Source)
at com.splunk.modinput.ModularInput.init(Unknown Source)
at com.splunk.jmx.JMXModularInputV3.main(Unknown Source)

2021-04-25 05:52:55,658 - com.splunk.modinput.ModularInput -0 [main] ERROR - Error executing modular input : null : java.lang.NullPointerException
at com.splunk.jmx.InfoManager.isJMXAccount(Unknown Source)
at com.splunk.jmx.InfoManager.getAccounts(Unknown Source)
at com.splunk.jmx.JMXModularInputV3.doRun(Unknown Source)
at com.splunk.modinput.ModularInput.init(Unknown Source)
at com.splunk.jmx.JMXModularInputV3.main(Unknown Source)