[IntelliJ][ReportedByUser] Uncaught Exception java.lang.AssertionError: 1 : child= 'FilePartNode: 'addfriend.css'; children: 0; fs=LocalFileSystem; myFileOrUrl=file://C:/Users/AlexT/IdeaProjects/BestTeamProjectGit/src/main/resources/static/css/addfriend.css; class java.lang.String'; child.nameEqualTo(nameId)=false; child.getClass()=class com.intellij.openapi.vfs.impl.FilePartNode; child.nameId=159985; child.getName()='addfriend.css'; nameId=1840290; name='addFriend.css'; compare(child) = 0; UrlPart.nameEqu

IntelliJ build version: 2023.1 IU-231.8109.175
OS: Windows 11
JDK: JetBrains s.r.o. 17.0.6
Plugin version: 3.75.0-2023.1
Additional Info: None
Parent component:

com.intellij.openapi.wm.impl.IdeRootPane[,8,8,1920x1032,invalid,layout=com.intellij.openapi.wm.impl.IdeRootPane$MyRootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=449,maximumSize=,minimumSize=,preferredSize=]

Error message:

IdeaLoggingEvent[message=null, throwable=java.lang.AssertionError: 1 : child= 'FilePartNode: 'addfriend.css'; children

Begin with the IntelliJ 2023.1 environment and the FilePartNode/LocalFileSystem assertion shown in the report. No source file, test, or reproduction case is named, so first trace the assertion and establish a reproducible case involving addfriend.css and addFriend.css; done means the exception is resolved and the regression is covered by an appropriate test.