can not execute tests getting this error:
F4J: The requested version 1.7.16 by your slf4j binding is not compatible with [1.6]
SLF4J: See SLF4J Error Codes for further details.
2019-06-18 14:55:11.754 INFO c.k.k.core.main.WSVerificationExecutor - --------------------
2019-06-18 14:55:11.756 INFO c.k.k.core.main.WSVerificationExecutor - START Verification
2019-06-18 14:55:12.071 INFO c.k.k.c.c.k.CucumberBuiltinKeywords - Starting run keyword runFeatureFile: ‘Include/features/Login.feature’ and extract report to folder: ‘/var/folders/y0/zptd9wd94t1fhklfhhf1r1zc0000gp/T/Katalon/Include/features/Login.feature/20190618_145509/cucumber_report/1560884112066’…
2019-06-18 14:55:12.389 ERROR c.k.k.core.keyword.internal.KeywordMain - 
Keyword runFeatureFile was failed (Root cause: java.lang.NoClassDefFoundError: Locale
This looks similar to the following issue:
this is fixed after install v 621