I installed EZSearch in 7.1.4 and the macro was created but I couldn't get it to recognize the parameters. I was passing them via RenderMacro as follows.

@Umbraco.RenderMacro("ezSearch", new { pageSize = 3, rootContentNodeID = 1819, searchFields = "pageTitle, nodeName, bodyText, summary, metaDescription", searchFormLocation = "none" })

Turns out, installing the package created the macro but did not actually define the parameters.

To get my parameters to work, I had to go into Developer > Macros > ezSearch and add the macro parameters. I figured out the correct aliases and types via the code in ezSearch.cshtml and the documentation. Beware, the aliases are case sensitive! This is what it looked like when I finished.