Getting java.lang.NullPointerException While Running Jenkins Suite with KRE and how to resolve it?

The execution log you are using is about KRE v7.6.6

1630999543713	Marionette	
INFO	Listening on port 61506 21630999543903	Marionette	WARN	
TLS certificate errors will be ignored for this session 31630999543905	Marionette	INFO	
Proxy settings initialised: {"proxyType":"manual","ftpProxy":"cov2seceng12.am.tsacorp.com:49277","httpProxy":"cov2seceng12.am.tsacorp.com:49277","sslProxy":"cov2seceng12.am.tsacorp.com:49277"} 
41630999543915	Marionette	
ERROR	[15] No reply from Marionette:Register 5Sep 07, 
2021 3:25:43 AM org.openqa.selenium.remote.ProtocolHandshake createSession 6INFO: 
Detected dialect: W3C 72021-09-07 03:25:44.149 INFO  c.k.k.core.webui.driver.DriverFactory    
- sessionId = 9a20d1db-9cdf-4b35-b1d6-fb64fd134228 82021-09-07 03:25:44.163 INFO  c.k.k.core.webui.driver.DriverFactory    
- browser = Firefox 85.0 92021-09-07 03:25:44.163 INFO  c.k.k.core.webui.driver.DriverFactory    
- platform = Windows Server 2012 R2 102021-09-07 03:25:44.164 INFO  c.k.k.core.webui.driver.DriverFactory    
- seleniumVersion = unknown 112021-09-07 03:25:44.165 INFO  c.k.k.core.webui.driver.DriverFactory    
- proxyInformation = ProxyInformation { proxyOption=MANUAL_CONFIG, proxyServerType=HTTP, username=, password=********, proxyServerAddress=cov2seceng12.am.tsacorp.com, proxyServerPort=49277, executionList="", isApplyToDesiredCapabilities=true } 12console.error: Region.jsm: "Error fetching region" (new Error("TIMEOUT", "resource://gre/modules/Region.jsm", 775)) 13console.error: Region.jsm: "Failed to fetch region" (new Error("TIMEOUT", "resource://gre/modules/Region.jsm", 422)) 14 15-------------------------------------------------------------------------------- 16Test Suites/AppScan/UserStory/UOB_6_3/TBB-1900/TBB-1900_Scan1_GBS_146561 - Firef 17ox - 20210907_032537.....................................................0/2(0%) 18-------------------------------------------------------------------------------- 19 202021-09-07 03:25:58.662 INFO  c.k.k.c.webui.common.WebUiCommonHelper   - Unable to find the element located by 'By.xpath: //div[@id = 'splash-7717216-close-button' and @title = 'Close']'. 
Please recheck the objects properties to make sure the desired element is located.

As the null pointer exceptions log doesn’t affect the test executions, you can ignore it or upgrade to v8.1.0.

The root cause may come from the test could not navigating to your URL, we suggest you can check Firefox proxy in Firefox preferences. Please double-check its proxy from both sides, your firefox and your Katalon proxy setting. 

If you are not sure where to check out, please refer to the below images (dark background is from firefox proxy, light background is from Katalon setting)and this document for better implementation: Katalon ​Proxy Settings