For some reason I get a blank screen on HN polls on my normal Chrome configuration, javascript error trace: Uncaught TypeError: Cannot read property 'querySe

For some reason I get a blank screen on HN polls on my normal Chrome configuration, javascript error trace: Uncaught TypeError: Cannot read property 'querySelector' of null at HNComments.markupToNodeList (hn.js:397) at HNComments.apply (hn.js:666) at Object.doAfterCommentsLoad (hn.js:1265) at Object.loadMoreLink (hn.js:1243) at Object.doCommentsList (hn.js:1070) at Object.init (hn.js:797) at hn.js:1913 Works in Incognito, so must somehow be related to one of my extensions; but it's not uBlock Origin, which would normally be my first suspicion. Anyone else have this problem?