Error when trying to update IntelliJ IDEA

Question

I'm using IntelliJ IDEA 2021.1.1.1 and I'm trying to update to 2021.1.1.3 (last available so far).

I'm trying by Help > Check for Updates > Update > Update and Restarts

Nothing Happens...

In the log file have this error:

2021-10-29 12:10:24,884 [268243632] ERROR - llij.ide.plugins.PluginManager - class com.intellij.ide.plugins.IdeaPluginDescriptorImpl cannot be cast to class com.intellij.ide.plugins.PluginNode (com.intellij.ide.plugins.IdeaPluginDescriptorImpl and com.intellij.ide.plugins.PluginNode are in unnamed module of loader com.intellij.util.lang.PathClassLoader @67b6d4ae) java.lang.ClassCastException: class com.intellij.ide.plugins.IdeaPluginDescriptorImpl cannot be cast to class com.intellij.ide.plugins.PluginNode (com.intellij.ide.plugins.IdeaPluginDescriptorImpl and com.intellij.ide.plugins.PluginNode are in unnamed module of loader com.intellij.util.lang.PathClassLoader @67b6d4ae) at com.intellij.ide.plugins.newui.ListPluginComponent.createTag(ListPluginComponent.java:293) at com.intellij.ide.plugins.newui.ListPluginComponent.(ListPluginComponent.java:105) at com.intellij.openapi.updateSettings.impl.PluginUpdateDialog.createListComponent(PluginUpdateDialog.java:255) at com.intellij.openapi.updateSettings.impl.PluginUpdateDialog.lambda$new$2(PluginUpdateDialog.java:115) at com.intellij.ide.plugins.newui.PluginsGroupComponent.addToGroup(PluginsGroupComponent.java:200) at com.intellij.ide.plugins.newui.PluginsGroupComponent.addGroup(PluginsGroupComponent.java:182) at com.intellij.ide.plugins.newui.PluginsGroupComponent.addGroup(PluginsGroupComponent.java:73) at com.intellij.ide.plugins.newui.PluginsGroupComponent.addGroup(PluginsGroupComponent.java:69) at com.intellij.openapi.updateSettings.impl.PluginUpdateDialog.(PluginUpdateDialog.java:127) at com.intellij.openapi.updateSettings.impl.PluginUpdateDialog.(PluginUpdateDialog.java:71) at com.intellij.openapi.updateSettings.impl.UpdateInfoDialog.downloadPatchAndRestart(UpdateInfoDialog.java:218) ...

Answer 1

I also have your issue,you can not try by Help > Check for Updates > Update > Update and Restarts,but Files > settings > Appearance & Behavior > System Settings > Updates,then check for updates,ok

Answer 2

I had the same issue. I was able to work around it by installing the update via the Jetbrains toolbox app. You can find it here : https://www.jetbrains.com/toolbox-app/