Failed to start bean ‘documentationPluginsBootstrapper‘； nested exception is java.lang.NullPointerEx

Failed to start bean ‘documentationPluginsBootstrapper‘； nested exception is java.lang.NullPointerEx

测试swagger时报错 Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException

springboot版本过高，这里用的是2.6.2，

降为 2.5.6就可以了，这里爆红是idea的问题