# Javascript failure since upgrading from 5.2.1 to 5.2.3

**URL:** <https://community.openhab.org/t/javascript-failure-since-upgrading-from-5-2-1-to-5-2-3/170838>\
**Category:** Migration\
**Created:** [October 31, 2026, 3:36pm UTC](https://community.openhab.org/t/javascript-failure-since-upgrading-from-5-2-1-to-5-2-3/170838 "2026-10-31T15:36:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![obones](https://community.openhab.org/user_avatar/community.openhab.org/obones/32/68523_2.png) [@obones](https://community.openhab.org/u/obones)\
**Post date:** [October 31, 2026, 3:36pm UTC](https://community.openhab.org/t/javascript-failure-since-upgrading-from-5-2-1-to-5-2-3/170838/1 "2026-10-31T15:36:44Z")

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Hello,

I have just upgraded from 5.2.1 to 5.2.3 and now all my Javascript rules are broken!  
This is what I get in the logs:

| time | level | bundle | message |
| --- | --- | --- | --- |
| 16:27:11.427 | WARN | org.openhab.core.karaf.internal.FeatureInstaller | The transformation add-on ‘javascript’ does not exist - ignoring it. |
| 16:27:50.545 | ERROR | org.openhab.core.automation.module.script.internal.ScriptEngineManagerImpl | ScriptEngine for language ‘application/javascript’ could not be found for identifier: 9ccbaa5a-2cf6-4a4f-92f1-3adfeace955b |
| 16:28:50.545 | ERROR | org.openhab.core.automation.module.script.internal.ScriptEngineManagerImpl | ScriptEngine for language ‘application/javascript’ could not be found for identifier: 9ccbaa5a-2cf6-4a4f-92f1-3adfeace955b |
| 16:29:00.167 | ERROR | org.openhab.core.automation.module.script.internal.ScriptEngineManagerImpl | ScriptEngine for language ‘application/javascript’ could not be found for identifier: 9ccbaa5a-2cf6-4a4f-92f1-3adfeace955b |

Did you see this as well?  
What did I miss in the announcements?

---

<div class="post-metadata">

**Author:** ![obones](https://community.openhab.org/user_avatar/community.openhab.org/obones/32/68523_2.png) [@obones](https://community.openhab.org/u/obones)\
**Post date:** [October 31, 2026, 3:43pm UTC](https://community.openhab.org/t/javascript-failure-since-upgrading-from-5-2-1-to-5-2-3/170838/2 "2026-10-31T15:43:03Z")

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Hum… strange…  
Removing the Javascript plugin, adding it back in, restarting openhab5 and this works again.

A simple restart was of no help.