zotero-better-bibtex: BBT yields error with quality report

I just updated to BBT 5.2.4 (with Zotero 5.0.81-beta.17+7c1845b3a). Clicking on the “Export now” button in the BBT dialog box yields the message “Error: translation failed”. I exported earlier today using the same version of Zotero but the previous version of BBT with no errors.

Report ID: XKD3B9BE-euc

Here’s the error log:

Warning: NetUtil.newChannel(uri) deprecated, please provide argument 'aWhatToLoad'

[JavaScript Error: "{better-bibtex! +null} <Error: TypeError: this.has is undefined
check@resource://zotero-better-bibtex/Better%20BibLaTeX.js:10005:17
./bibtex/biblatex.qr.bcf/module.exports@resource://zotero-better-bibtex/Better%20BibLaTeX.js:10074:31
qualityReport@resource://zotero-better-bibtex/Better%20BibLaTeX.js:11545:22
complete@resource://zotero-better-bibtex/Better%20BibLaTeX.js:11163:16
doExport@resource://zotero-better-bibtex/Better%20BibLaTeX.js:9069:9
onmessage@resource://zotero-better-bibtex/worker/Zotero.js?client=zotero&version=5.0.81-beta.17+7c1845b3a&platform=mac&translator=Better%20BibLaTeX&output=/Users/jrennstich/Dropbox/mylibrary.bib:25672:13
#
undefined> "]

[JavaScript Error: "TypeError: this.has is undefined
check@resource://zotero-better-bibtex/Better%20BibLaTeX.js:10005:17
./bibtex/biblatex.qr.bcf/module.exports@resource://zotero-better-bibtex/Better%20BibLaTeX.js:10074:31
qualityReport@resource://zotero-better-bibtex/Better%20BibLaTeX.js:11545:22
complete@resource://zotero-better-bibtex/Better%20BibLaTeX.js:11163:16
doExport@resource://zotero-better-bibtex/Better%20BibLaTeX.js:9069:9
onmessage@resource://zotero-better-bibtex/worker/Zotero.js?client=zotero&version=5.0.81-beta.17+7c1845b3a&platform=mac&translator=Better%20BibLaTeX&output=/Users/jrennstich/Dropbox/mylibrary.bib:25672:13
"]

[JavaScript Error: "{better-bibtex! +2} Translators.exportItems failed in {"time":7158,"translatorID":"f895aa0d-f28e-47fe-b247-2ea77c6ed583","displayOptions":{"exportNotes":false,"useJournalAbbreviation":false,"preference_DOIandURL":"doi","preference_asciiBibLaTeX":true,"preference_asciiBibTeX":true,"preference_bibtexParticleNoOp":false,"preference_bibtexURL":"off","preference_biblatexExtendedNameFormat":false,"exportPath":"/Users/jrennstich/Dropbox"},"path":"/Users/jrennstich/Dropbox/mylibrary.bib"} "]

[JavaScript Error: "{better-bibtex! +1} AutoExport.queue.run: failed {"type":"library","id":1,"path":"/Users/jrennstich/Dropbox/mylibrary.bib","status":"running","translatorID":"f895aa0d-f28e-47fe-b247-2ea77c6ed583","exportNotes":false,"useJournalAbbreviation":false,"DOIandURL":"doi","asciiBibLaTeX":true,"asciiBibTeX":true,"biblatexExtendedNameFormat":false,"bibtexParticleNoOp":false,"bibtexURL":"off","error":"translation failed","meta":{"revision":25,"created":1573635382986,"version":0,"updated":1578685993991},"$loki":14} translation failed "]

version => 5.0.81-beta.17+7c1845b3a, platform => MacIntel, oscpu => Intel Mac OS X 10.15, locale => en-US, appName => Zotero, appVersion => 5.0.81-beta.17+7c1845b3a, extensions => Zotero DOI Manager (1.3.9, extension), ZotFile (5.0.14, extension), Zutilo Utility for Zotero (3.3.3, extension), ZoteroQuickLook (1.4.2, extension), Zotero Word for Mac Integration (5.0.24.SA.5.0.81-beta.17+7c1845b3a, extension), Zotero LibreOffice Integration (5.0.21.SA.5.0.81-beta.17+7c1845b3a, extension), Better BibTex for Zotero (5.2.4, extension), Shockwave Flash (32.0.0.303, plugin), Zotero automatic export (1.2.4, extension, disabled)