TypeError: Cannot read property 'rows' of undefined

Whenever I open my project, the extension fails with:

ERR Cannot read property 'rows' of undefined: TypeError: Cannot read property 'rows' of undefined
    at u.open (/home/x/.vscode/extensions/redhat.java-0.76.0/dist/extension.js:15:69804)
    at S.startSendingEvents (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:88:32770)
    at u._setupExtHostProcessListeners (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:88:37551)
    at u.attachPtyToTerminal (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:88:34952)
    at S.$onDidStartTask (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:90:46370)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)

I inspected the extensions file and it seems that e is undefined:

open(e){
   s.serverTasks.suggestTaskEntrySize(e.rows-1);
   const t=s.serverTasks.getHistory();
   this.printTasks(t)
}

and then after a few seconds:

ERR The request (id: 1, method: 'textDocument/documentSymbol') has been cancelled: Error: The request (id: 1, method: 'textDocument/documentSymbol') has been cancelled
    at /home/x/.vscode/extensions/redhat.java-0.76.0/dist/extension.js:1:76464
    at /home/x/.vscode/extensions/redhat.java-0.76.0/dist/extension.js:1:76758
    at Immediate.<anonymous> (/home/x/.vscode/extensions/redhat.java-0.76.0/dist/extension.js:1:77117)
    at processImmediate (internal/timers.js:456:21)

Here are some info messages it shows before:

{
  message: 'Starting Java server with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java --add-modules=ALL-SYSTEM --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Dfile.encoding=utf8 -XX:+UseParallelGC -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -Dsun.zip.disableMemoryMapping=true -Xmx1G -Xms100m -javaagent:/home/x/.vscode/extensions/gabrielbb.vscode-lombok-1.0.1/server/lombok.jar -noverify -jar /home/x/.vscode/extensions/redhat.java-0.76.0/server/plugins/org.eclipse.equinox.launcher_1.6.100.v20201223-0822.jar -configuration /home/x/.config/Code/User/globalStorage/redhat.java/0.76.0/config_ss_linux -data /home/x/.config/Code/User/workspaceStorage/dfcb4a389a57c5e007b1c06673447101/redhat.java/ss_ws',
  level: 'info',
  timestamp: '2021-03-22 10:41:18.617'
}
{
  message: 'Starting Java server with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java --add-modules=ALL-SYSTEM --add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Dfile.encoding=utf8 -XX:+UseParallelGC -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -Dsun.zip.disableMemoryMapping=true -Xmx1G -Xms100m -javaagent:/home/x/.vscode/extensions/gabrielbb.vscode-lombok-1.0.1/server/lombok.jar -noverify -jar /home/x/.vscode/extensions/redhat.java-0.76.0/server/plugins/org.eclipse.equinox.launcher_1.6.100.v20201223-0822.jar -configuration /home/x/.config/Code/User/globalStorage/redhat.java/0.76.0/config_linux -data /home/x/.config/Code/User/workspaceStorage/dfcb4a389a57c5e007b1c06673447101/redhat.java/jdt_ws',
  level: 'info',
  timestamp: '2021-03-22 10:41:18.689'
}

This previously worked so I'm not sure what changed.

Environment

• Operating System: Debian GNU/Linux 10 (buster)
• JDK version: OpenJDK Java 11 AMD64, project JDK: 1.8
• Visual Studio Code version: 1.54.3
• Java extension version: 0.76.0

Start with the reported stack trace in the bundled extension.js from redhat.java 0.76.0 and reproduce the failure when opening the project on the listed VS Code and Java versions. Trace the task startup path around open(e) and determine why its argument is undefined; done means opening the project no longer raises the rows TypeError and the subsequent document-symbol request is not cancelled.