But the debug log show：[JavaScript Error: "HTTP POST https://www-webofscience-com-s-webvpn-cams-cn.s.webvpn.cams.cn/api/wosnx/indic/export/saveToFile failed with status code 0"]

[JavaScript Error: "Der Wert für das Maß muss zwischen 0,7 Pt. und 1584 Pt. liegen. [setBibliographyStyle:y:\adomas\zotero\word-for-windows-integration\build\zoterowinwordintegration\document.cpp]"]

Open run Javascript window

[JavaScript Error: "Only 0 translators present in cache. Resetting

[JavaScript Error: "Error: Selected field SsyYUb not returned from Docs backend

4) Run a Debug ID D731311854, which output reads [JavaScript Error: "Error connecting to server. Check your Internet connection."]

[JavaScript Error: "HTTP request to https://doi.org/10.3760/cma.j.cn321828-20210507-00154 has timed out after 15000ms" {file: "chrome-extension://nmhdhpibnnopknkmonacoephklnflpho/zotero.js" line: 306}

[JavaScript Error: "Win error 5 during operation removeEmptyDir on file C:\Users\[…]\Zotero\storage\UQ9X59DB (Access is denied.

If you want to delete them, you can use this code in Tools → Developer → Run JavaScript:

Not easily, no. You can script it, but that requires javascript: https://www.zotero.org/support/dev/client_coding/javascript_api#batch_editing

[JavaScript Error: "/usr/lib/zotero/pdftotext returned exit status 127" {file: "chrome://zotero/content/xpcom/utilities_internal.js" line: 756}]

[JavaScript Error: "Error connecting to proxy -- proxied requests may not work"]

but must be run under Tools\Developer\Run Javascript, which makes it a bit impractical:

[JavaScript Error: "Download request 1/NGA5DK5Y failed"]

[JavaScript Error: "Promised response from onMessage listener went out of scope

I can reproduce this bug by adding many lines into the Extra field. [JavaScript Error: "this._id(...) is null" {file: "chrome://zotero/content/elements/relatedBox.js" line: 131}]

If I first select a child item and then its parent item, then press Delete, the deletion fails. If I select the parent item first and then the child item, then the deletion is successful. [JavaScript

[JavaScript Warning: "unreachable code after return statement" {file: "resource://zotero/loader.jsm -> resource://zotero/bluebird/util.js" line: 205 column: 4 source: " eval(obj);

I actually already searched for the "IJ9JPBJC" folder and deleted the file and folder manually (+ emptied the trash with rm -rf ~/.local/share/Trash/*). Because surprisingly there were no annotations

[JavaScript Error: "A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received" {file: "chrome-extension://nmhdhpibnnopknkmonacoephk