autocompleter 异常

异常信息：

root cause

Expression parameters.parseContent is undefined on line 45, column 28 in template/ajax/head.ftl. - Class: freemarker.core.TemplateObject
File: TemplateObject.java
Method: assertNonNull
......

freemarker.core.InvalidReferenceException: Expression parameters.parseContent is undefined on line 45, column 28 in template/ajax/head.ftl.

......