Due to an issue with the JVM installed with Domino V11.0.1, LE4D throws an error when the tool tries to import the new / renewed certificate into the Domino keyring file.
The agent calls the kyrtool and passes the required parameters to the tool.
On the Domino V11.0.1 console, you will see an error

13.04.2020 06:48:52 Agent error: java.io.IOException: Cannot run program "cmd.exe": Malformed argument has embedded quote: "d:\domino\kyrtool.exe" create -k "d:\domino\data\eknori_staging.kyr"
13.04.2020 06:48:52 Agent error: at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
13.04.2020 06:48:52 Agent error: at java.lang.Runtime.exec(Runtime.java:621)
13.04.2020 06:48:52 Agent error: at java.lang.Runtime.exec(Runtime.java:486)
13.04.2020 06:48:52 Agent error: at de.midpoints.le4d.tools.CommandProcessor.executeCommand(CommandProcessor.java:11)
13.04.2020 06:48:52 Agent error: at de.midpoints.le4d.manager.Le4dManager.runKyrTool(Le4dManager.java:623)
13.04.2020 06:48:52 Agent error: at de.midpoints.le4d.manager.Le4dManager.run(Le4dManager.java:205)
13.04.2020 06:48:52 Agent error: at de.midpoints.MPStarter.NotesMain(MPStarter.java:16)
13.04.2020 06:48:52 Agent error: at lotus.domino.AgentBase.runNotes(Unknown Source)
13.04.2020 06:48:52 Agent error: at lotus.domino.NotesThread.run(Unknown Source)
13.04.2020 06:48:52 Agent error: Caused by:

The problem is not in the code itself, because it runs on Domino V9.0.1FP10 and also on Domino V10.x and also on Domino V11. It seemed to stop working after upgrading the server to V11.0.1

I searched for the error on Google and found some references to it. The cause of this error is due to the Java update mentioned here: https://www.oracle.com/technetwork/java/javase/13-0-1-relnotes-5592797.html#JDK-8221858

To fix the error in Domino V11.0.1 do the following

• If not already in place, create a new text file javaOptions.txt in the DominoDataDir
• Add the following line to the javaOptions.txt file ( If you already have a javaOptions file, append the new entry to the existing lines in the file)
  -Djdk.lang.Process.allowAmbiguousCommands=true
• Save javaOptions.txt
• Add the following line to the server notes.ini
  JAVAOPTIONSFILE=DominoDataDir/javaoptions.txt
• Restart the server

When you now run the LE4D tool, everything should work!