RuleEngineImpl getInjector returns null #5221
Description
Expected Behavior
RuleEngineImpl should invoke triggered rules without causing null exceptions.
Current Behavior
After invoking a scheduled rule or a trigger rule, the below error is logged.
The scheduled rule sets an audio device to mute in the evening.
The triggered rule reacts to a start day from the astron:sun:local add-on.
Error logged:
Time 07:26:54.551 Timestamp Dec 23, 2025, 7:26:54 AM Level ERROR Logger Class org.openhab.core.automation.internal.RuleEngineImpl Message Failed to execute rule '3fd3b6bbe5': Failed to execute action: 3(Cannot invoke "com.google.inject.Injector.getInstance(java.lang.Class)" because the return value of "org.openhab.core.model.script.ScriptStandaloneSetup.getInjector()" is null)
Possible Solution
Steps to Reproduce (for Bugs)
Context
Concerned that this may be caused by an improper upgrade.
Your Environment
openHAB 5.1.0
Release Build
Main UI Commit 69bf7f37
Operating system
Linux/6.12.57+deb13-amd64 (amd64)
Java Runtime
Eclipse Adoptium
21.0.9 (Temurin-21.0.9+10)