A month ago, there was a similar topic which reported a problem about Katalon Studio v9.7.2; an user encountered a groovy.lang.MissingMethodException for java.util.Date.format(String) method. See the following topic:
I believe that @281558325 encountered a problem that comes from the same reason as this previous topic.
A Katalon staff wrote:
I am not sure if any patch for this particular issue has been released yet.