Java.lang.NullPointerException error when saving a file in VSCode

I need help to resolve a Java error when saving files in VSCode. The error begins with the following message and is followed by over 1,500 lines of similar info.

2024-05-07 09:25:46.060 [ERROR] [st.antlr.ContentAssistContextFactory] - java.lang.RuntimeException: java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.lang.NullPointerException
	at ~[?:?]
    at java.util.concurrent.FutureTask.get( ~[?:?]

This particular error was triggered by saving the Items file shown below but happens frequently when saving any type of config file. I can’t say for sure if it happens every time a file is saved.

The log file showing the full error messages is attached.
openhab.log (208.7 KB)

The Items file that triggered this particular instance is a one-liner.

DateTime    RuleTimeAirCompressor           "AirCompressorRule [%1$tm/%1$td/%1$ty %1$tH:%1$tM]"

I have no idea how to research/resolve this. Help is very much needed.

  • Platform information:
    • Hardware: Synology RS1221+
    • OS: DSM 7.2 (Linux based), Docker 20.10.23-1437
    • Java Runtime Environment: I believe it is Java 17, whatever the openhab/openhab Docker image installs
    • openHAB version: 4.1.2 pulled from openhab/openhab about a week ago. But this issue started occurring using openHAB 3
    • VSCode is running on Windows 10 Pro with all updates applied
    • The opehnab.log file is open in NotePad++ which also has all updates applied.