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TypeError: Cannot read properties of null (reading 'getModel')
Open, HighPublicPRODUCTION ERROR

Description

Seems to have begun in 1.45.0-wmf.22 and spiked in 1.45.0-wmf.23
Error: TypeError: Cannot read properties of null (reading 'getModel')
1,575 errors in last 7 days, mostly impacting mobile site

Stack trace:

at Controller.updateForListener  https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.visualEditor.core%2CeditCheck%2CmobileArticleTarget%2Cmwtransclusion&skin=minerva&version=1o32q:1086:908
at https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.visualEditor.core%2CeditCheck%2CmobileArticleTarget%2Cmwtransclusion&skin=minerva&version=1o32q:1086:498
at eval  https://pl.m.wikipedia.org/w/load.php?lang=pl&modules=oojs-ui-windows&skin=minerva&version=1whv6:6:877
at OO.ui.Process.execute  https://pl.m.wikipedia.org/w/load.php?lang=pl&modules=oojs-ui-windows&skin=minerva&version=1whv6:7:555
at Controller.refresh  https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.visualEditor.core%2CeditCheck%2CmobileArticleTarget%2Cmwtransclusion&skin=minerva&version=1o32q:1086:541
at https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.visualEditor.core%2CeditCheck%2CmobileArticleTarget%2Cmwtransclusion&skin=minerva&version=1o32q:1084:853

https://logstash.wikimedia.org/goto/b323c8fe515931c5d2f8d0705a69617a

Steps to replicate the issue (include links if applicable):

What happens?:

What should have happened instead?:

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

Event Timeline

Restricted Application changed the subtype of this task from "Bug Report" to "Production Error". · View Herald TranscriptOct 17 2025, 11:36 PM
Restricted Application added a subscriber: Aklapper. · View Herald Transcript

The error rate for was 11,453 in the last 7 days. This is the biggest logspam offender for JavaScript errors right now.