TypeError: Cannot read properties of undefined (reading 'length')

[krabina]

When trying to use the extension with parser function or Special:Network, nothing is displayed. This is shown in console:

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'length')
    at load.php?lang=de&modules=ext.bootstrap.scripts%7Cext.network%7Cext.smw.styles%7Cjquery%2Coojs-ui-core%7Cmediawiki.action.view.postEdit%7Cmediawiki.notification%2CvisibleTimeout%7Coojs-ui.styles.icons-interactions&skin=chameleon&version=alsor:823:417
    at Array.map (<anonymous>)
    at module.NetworkData.NetworkData.addPages (load.php?lang=de&modules=ext.bootstrap.scripts%7Cext.network%7Cext.smw.styles%7Cjquery%2Coojs-ui-core%7Cmediawiki.action.view.postEdit%7Cmediawiki.notification%2CvisibleTimeout%7Coojs-ui.styles.icons-interactions&skin=chameleon&version=alsor:823:364)
    at load.php?lang=de&modules=ext.bootstrap.scripts%7Cext.network%7Cext.smw.styles%7Cjquery%2Coojs-ui-core%7Cmediawiki.action.view.postEdit%7Cmediawiki.notification%2CvisibleTimeout%7Coojs-ui.styles.icons-interactions&skin=chameleon&version=alsor:849:171Understand this error

Software	Version
MediaWiki	1.39.12 (7077e6f)
PHP	8.2.20 (fpm-fcgi)
MySQL	8.0.28
ICU	73.2
Network	3.0.0