A similar problem was reported here: https://forums.zotero.org/discussion/72082/author-name-with-diacritics-causes-paragraph-mark-in-document-libreoffice-ubuntu-bookmarks/p1 it was fixed but it seems like the right behavior was not extended to these fields.

*Problem decryption:*
The issue happens when the *file* field has some accented/diacritic/diaeresis in its value the software does not load/attach/copy the file resource to the reference.

Report ID: 772123055

*Scope:*
2,345 files and 2658 references - I cannot fix all of them by hand

*System settings:*
version => 6.0.19, platform => Win32, oscpu => Windows NT 10.0; WOW64, locale => en-US, appName => Zotero, appVersion => 6.0.19, extensions => Zotero LibreOffice Integration (6.0.3.SA.6.0.19, extension), Zotero Word for Windows Integration (6.0.2.SA.6.0.19, extension)


*Steps to reproduce:*
1. Save text below as a .bib file, and import into Zotero
% -------------------------------------------------------------------------
% This BibTex file was generated by Qiqqa (http://www.qiqqa.com/?ref=EXPBIB)
% Friday, January 6, 2023 4:52:13 PM
% Version 3
% -------------------------------------------------------------------------


@article{kuhne2006matters
, author = {Thomas K\"uhne}
, title = {Matters of (meta-) modeling}
, journal = {Software and Systems Modeling}
, year = {2006}
, volume = {5}
, number = {4}
, pages = {369--385}
, publisher = {Springer}
, filename = {C:\\\\docs\\K\"uhne2006 - Matters of (meta-) modeling.pdf}
, file = {K\"uhne2006 - Matters of (meta-) modeling.pdf:docs/K\"uhne2006 - Matters of (meta-) modeling.pdf:application/pdf}
, tags = {MLM;ontological versus linguistic}
, keywords = {MLM;ontological versus linguistic}
}

@inbook{godel1933present
, author = {G\"odel, Kurt}
, title = {The present situation in the foundations of mathematics}
, year = {1933}
, pages = {45--53}
, volume = {3}
, journal = {Collected works}
, filename = {C:\\\\docs\\G\"odel1933 - The present situation in the foundations of mathematics.pdf}
, file = {Gӧdel1933 - The present situation in the foundations of mathematics.pdf:docs/Gӧdel1933 - The present situation in the foundations of mathematics.pdf:application/pdf}
}


*Error:*
the author, title, tags and keywords files are working OK, this means Zotero can translate accented/diacritic/diaeresis characters to its UTF-8 representation, e.g:
\"o -> ӧ
\"u -> ü

but the file and filename fields are crashing when they have the same characters. it looks like the right behavior was not extended to these fields.


*Evidences - Zotero logs:*
for the Author column:
(3)(+0000006): Translate: Replace(2) \"u in Thomas K\"uhne with ü
(3)(+0000004): Translate: Replace(2) \"u in Thomas K\"uhne with ü

for the file column:
(3)(+0000003): Translate: Replace(2) \"U in K\"Uhne2006 - Matters of (meta-) modeling.pdf:docs/K\"Uhne2006 - Matters of (meta-) modeling.pdf:application/pdf with ü
(3)(+0000000): Translate: Replace(2) \"U in KÜhne2006 - Matters of (meta-) modeling.pdf:docs/K\"Uhne2006 - Matters of (meta-) modeling.pdf:application/pdf with ü

and the reported error is:
(4)(+0000001): Translate: Adding attachment

(3)(+0000000): Zotero.Attachments.cleanAttachmentURI() is deprecated -- use Zotero.Utilities.cleanURL

(2)(+0000000): cleanURL: Invalid URI: docs/K{"u}hne2006 - Matters of (meta-) modeling.pdf

(3)(+0000000): Translate: Attempting to parse path docs/K{"u}hne2006 - Matters of (meta-) modeling.pdf

(3)(+0000000): Translate: File at C:\Users\zabalad\Downloads\dza_test_qiqqa\docs\K{"u}hne2006 - Matters of (meta-) modeling.pdf does not exist

(3)(+0000000): Translate: File at C:\Users\zabalad\Downloads\dza_test_qiqqa\docs\K{"u}hne2006 - Matters of (meta-) modeling.pdf does not exist

(3)(+0000001): Translate: File at C:\Users\zabalad\Downloads\dza_test_qiqqa\docs\K{"u}hne2006 - Matters of (meta-) modeling.pdf does not exist

(3)(+0000000): Translate: file:///docs/K%7B%22u%7Dhne2006%20-%20Matters%20of%20(meta-)%20modeling.pdf is not a file URI

(1)(+0000000): NS_ERROR_FILE_UNRECOGNIZED_PATH Exception: Component returned failure code: 0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH) [nsIFile.initWithPath] Zotero.File Error: Translate: Could not parse attachment path Zotero.Translate.ItemSaver.prototype._saveAttachmentFile<@chrome://zotero/content/xpcom/translation/translate_item.js:607:17 From previous event: saveItems@chrome://zotero/content/xpcom/translation/translate_item.js:250:30 Zotero_File_Interface</this.showImportWizard@chrome://zotero/content/fileInterface.js:393:5 oncommand@chrome://zotero/content/standalone/standalone.xul:1:1


Previously the system logs were showing the right translation for the character, see:
(3)(+0000000): Translate: Replace {\"u} in Kühne2006 - Matters of (meta-) modeling.pdf:docs/K{\"u}hne2006 - Matters of (meta-) modeling.pdf:application/pdf with ü
and after printing this it's just crashing when try to attached the file (maybe because it's not using the translated filename previously)

Thanks for you help.