Jenkins Error 403 No valid crumb was included in the request

WARNING hudson.security.csrf.CrumbFilter#doFilter: No valid crumb was included in request for /pluginManager/installPlugins by admin. Returning 403.

找到Jenkins安装目录，我的是centos yum方式安装的，在 /var/lib/jenkins

修改该目录下的config.xml配置文件：

excludeClientIPFromCrumb 的值改为 true

  <crumbIssuer class="hudson.security.csrf.DefaultCrumbIssuer">
    <excludeClientIPFromCrumb>true</excludeClientIPFromCrumb>
  </crumbIssuer>

重启jenkins