You can rename the predefined class to Kata and you should be able to submit your solution (if it's correct). But the author should rework his template.

Greetings everyone! Can anyone help understand the error?

symbol: variable Kata

location: class SolutionTest

src/test/java/SolutionTest.java:11: error: cannot find symbol

  assertEquals("a (b c (d e))", Kata.reverseParens("a ((d e) c b)"));
                                ^

In IntlijIdea, I get the right results.