https://github.com/wikimedia/mediawiki-extensions-CentralNotice/blob/master/modules/ext.centralNotice.bannerController/mobile/device.js is 404. It should be updated or removed accordingly.
This file was deleted in https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CentralNotice/+/221759, no idea what to replace.
# replication steps
* get a mediawiki instance with centralnotice installed
* visit Special:CentralNoticeBanners.
* click the link to a random banner ([[ https://meta.wikimedia.beta.wmflabs.org/wiki/Special:CentralNoticeBanners/edit/Test_js_issue2 | example ]])
* Found the "Selector logic" link in Settings > Display on
# what needs to change
Please update the URL in https://github.com/wikimedia/mediawiki-extensions-CentralNotice/blob/ed8a7c3b8e92a48f7c4286360bc91dce86148345/i18n/en.json#L210