Latest Katalon 5.8.6 with latest FF browser 62.0 not work with cmd, with Chrome cmd works

when used FF as browser will get
cause: java.lang.SecurityException: class “org.openqa.selenium.firefox.FirefoxOptions”'s signer information does not match signer information of other classes in the same package) at com.kms.katalon.core.keyword.internal.KeywordMain.stepFailed(KeywordMain.groovy:36) at com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain.stepFailed(WebUIKeywordMain.groovy:65) at com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain.runKeyword(WebUIKeywordMain.groovy:27) at com.kms.katalon.core.webui.keyword.builtin.OpenBrowserKeyword.openBrowser(OpenBrowserKeyword.groovy:81) at com.kms.katalon.core.webui.keyword.builtin.OpenBrowserKeyword.execute(OpenBrowserKeyword.groovy:67) at com.kms.katalon.core.keyword.internal.KeywordExecutor.executeKeywordForPlatform(KeywordExecutor.groovy:53) at com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords.openBrowser(WebUiBuiltInKeywords.groovy:60)

and same test pattern with Chrome browser no issues at all

AND with the new instructions (found from Katalon discussion group)
when done like this way
“I downgraded the guava version to 19 and works fine.
Download here:
and follow Vinh Nguyen’s steps.”
after that cannot record or spy any browser

is there coming new patch where this will be fixed?


org.openqa.selenium.firefox.FirefoxOptions"'s signer information does not match signer information of other classes in the same package

I did search and found the following thread:

This thread indicates that you have multiple sources (jar files) from which classes of the org.openqa.selenium.firefox.* package are loaded by JVM.

Did you upgraded Katalon Studio recently?

It would be an idea to uninstall Katalon Studio once and reinstall it.