错误：在更改 minSdkVersion 时等待锁定生成文件的生成脚本类缓存超时

我尝试在（模块：应用程序）中进行更改并得到下一个错误：minSdkVersionbuild.gradleAndroid Studio

Error:Timeout waiting to lock buildscript class cache for build file 'E:\pathtoproject\app\build.gradle' (C:\Users\Administrator\.gradle\caches\2.2.1\scripts\build_f00bwdji3qxl7urq5chsbakgv\ProjectScript\buildscript). It is currently in use by another Gradle instance.
Owner PID: unknown
Our PID: 4592
Owner Operation: unknown
Our operation: Initialize cache
Lock file: C:\Users\Administrator\.gradle\caches\2.2.1\scripts\build_f00bwdji3qxl7urq5chsbakgv\ProjectScript\buildscript\cache.properties.lock

这是什么错误？如何更改 minSdkVersion ？