错误消息：
No signature of method: org.gradle.api.internal.file.DefaultProjectLayout$DefaultRegularFileVar.exists() is applicable for argument types: () values: []
Possible solutions: wait(), equals(java.lang.Object), wait(long), print(java.io.PrintWriter), is(java.lang.Object), with(groovy.lang.Closure)
gradle版本也已更新为3.3.0。我该如何解决？