更新了 IDEA 到 2020.3 之后，程序跑不起来了。

Internal error (java.lang.UnsupportedClassVersionError): org/intellij/erlang/jps/model/JpsErlangModelSerializerExtension has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
java.lang.UnsupportedClassVersionError: org/intellij/erlang/jps/model/JpsErlangModelSerializerExtension has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:370)
	at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
	at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
	at com.intellij.util.containers.ContainerUtilRt.copy(ContainerUtilRt.java:113)
	at com.intellij.util.containers.ContainerUtil.newArrayList(ContainerUtil.java:205)
	at org.jetbrains.jps.service.impl.JpsServiceManagerImpl$SingleClassLoaderPluginManager.loadExtensions(JpsServiceManagerImpl.java:113)
	at org.jetbrains.jps.service.impl.JpsServiceManagerImpl.loadExtensions(JpsServiceManagerImpl.java:105)
	at org.jetbrains.jps.service.impl.JpsServiceManagerImpl.getExtensions(JpsServiceManagerImpl.java:58)
	at org.jetbrains.jps.model.serialization.JpsModelSerializerExtension.getExtensions(JpsModelSerializerExtension.java:47)
	at org.jetbrains.jps.model.serialization.library.JpsSdkTableSerializer.getSdkPropertiesSerializer(JpsSdkTableSerializer.java:126)
	at org.jetbrains.jps.model.serialization.library.JpsSdkTableSerializer.loadSdk(JpsSdkTableSerializer.java:64)
	at org.jetbrains.jps.model.serialization.library.JpsSdkTableSerializer.loadSdks(JpsSdkTableSerializer.java:56)
	at org.jetbrains.jps.model.serialization.JpsGlobalLoader$SdkTableSerializer.loadExtension(JpsGlobalLoader.java:124)
	at org.jetbrains.jps.model.serialization.JpsGlobalLoader$SdkTableSerializer.loadExtension(JpsGlobalLoader.java:117)
	at org.jetbrains.jps.model.serialization.JpsLoaderBase.loadComponents(JpsLoaderBase.java:46)
	at org.jetbrains.jps.model.serialization.JpsGlobalLoader.loadGlobalComponents(JpsGlobalLoader.java:80)
	at org.jetbrains.jps.model.serialization.JpsGlobalLoader.load(JpsGlobalLoader.java:70)
	at org.jetbrains.jps.model.serialization.JpsGlobalLoader.loadGlobalSettings(JpsGlobalLoader.java:43)
	at org.jetbrains.jps.model.serialization.impl.JpsSerializationManagerImpl.loadModel(JpsSerializationManagerImpl.java:21)
	at org.jetbrains.jps.cmdline.JpsModelLoaderImpl.loadModel(JpsModelLoaderImpl.java:34)
	at org.jetbrains.jps.cmdline.BuildRunner.load(BuildRunner.java:64)
	at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:279)
	at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:132)
	at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:219)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
我程序用的是 JDK8，看报错就是编译和运行使用的 JDK 版本不一致导致的，刚开始以为是 IDEA 配置的编译器版本问题，于是把所有的能设置的地方全都检查了一遍
 
项目配置
 
 compiler
 

 结果全都改成了 JDK 8都没有用！，又想着我本地是 15 的 JDK ， 死马当活马医试一下
 

 改了一通还是没有用。
 
于是到 jetbrains 的问题单里面试着搜一下
 
https://youtrack.jetbrains.com/issues
 

 不搜不知道，一搜吓一跳，就在前两周，有人刚提了问题单，点进去一看，对症，于是根据老哥的建议，设置了一下。
 
 
解决办法：禁用 Erlang 插件
 
禁用之后，重启 IDEA ，问题解决。
 
https://youtrack.jetbrains.com/issue/IDEA-256900
				
总结：一、如果编译时有以上提示，则选择"Project"菜单中的"Project Properties"，在弹出的窗口中选择“paths”，点击右边的jdk后面的"...",选择不同版本的JDK（如果没有你要使用的JDK可以点击"new"，然后根据向导添加需要的JDK），然后点击“OK”.再点击“OK”即可。如果不行再换其它的JDK。二、如果运行时有以上提示，则选择"Project"菜单中的"Project Properties"，在弹出的窗口中左侧选择“ Build-->Java”，在右边的选项中有四个下拉框，就可以看到编译选项了，其中Compiler和Debug Option可以不用管，只在Languege features和Target VM中选择相应的JDK版本就可以了，然后确定，一切OK。。
				
解决Java.lang.UnsupportedClassVersionError。
这个我也是今天写项目碰到的这个问题，代码运行中出现了这个报错，烦恼了一下午。
先给大家看我报错的截图
产生的原因
我看了许多大佬的讲解，总的来说就是JDK高的版本向JDK低的转化时，才会出现这种情况
解决步骤
在idea中点击File–>Settings–>Build,Execution,Deployement–>Compiler–>java Compiler,进行修改JDK的版本。
D:\serviceT>gradlew makeJar
Starting a Gradle Daemon, 1 incompatible Daemon could not be reused, use --status for details
FAILURE: Bui
				
Error:Internal error: (java.util.concurrent.ExecutionException) org.jetbrains.jps.model.serialization.CannotLoadJpsModelException: Cannot parse file /IdeaProjects/live-web/live-web-common/live-web-common.iml: Error on line 1: 文件提前结束。
java.util.concurrent.
springboot应用在使用maven编译时会报如下错误：
Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0
[ERROR] Failed to execute goal org.springframework.boot:spring-bo
FAILURE: Build failed with an exception.
What went wrong:
Execution failed for task ':xs_progress_hud:verifyReleaseResources'.
> java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2Exception: Android resou
					
Error:FAILURE: Build failed with an exception.  * What went wrong: Task 'generate_360DebugSources' n