[IntelliJ][ReportedByUser] Uncaught Exception java.lang.IllegalStateException: Missing header Content-Length in input "t

IntelliJ build version: 2023.3.3 IC-233.14015.106
OS: Windows 11
JDK: JetBrains s.r.o. 17.0.9
Plugin version: 3.85.0-2023.3
Additional Info: None
Parent component:

com.intellij.openapi.wm.impl.IdeRootPane[,8,0,2304x1236,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.IllegalStateException: Missing header Content-Length in input "t
{"jsonrpc":"2.0","id":2,"method""<REDACTED: user-file-path>,"paams:"rgistrins":["id:aae54ab-27-4aa71f5870766d""mthod":"etouetfratin""eistrOption":"ouetSleco"["language":"ie"}]}}{i""aabf-c3-55bb6-6934d50a","ethod""etDocumetsgnatureHl""regitrOptin"{"rggerCarctr":["(,,"")]"retigrCharatr":[],dcmnSelcor:["agag""ie"]},{i""f9b71ae1-89-127e51ef""ehd:<REDACTED: user-file-path>""eitrOptions":{"ocmnSlcto"["langae:bcp}]},{"id""48f79d0-44-fb-43c5a8,mto""tetouethvr,rgseOtos":{"dcmnSlcor

Start by reproducing the uncaught IllegalStateException in IntelliJ 2023.3.3 with plugin version 3.85.0-2023.3 on Windows 11 and inspect the input that lacks the Content-Length header. The report names no source file or test, so identify the relevant input-handling entry point before determining what change and verification are needed.