Public Share previews do not work

[kekkodance]

Describe the bug
when sharing a folder or a file publicly, the previews do not load at all. in the normal nextcloud files section, the previews load perfectly though

running on Nextcloud AIO mastercontainer

To Reproduce
Steps to reproduce the behavior:

1. share a folder or a file
2. access the link in incognito
3. click on a file
4. open devtools and see the errors

Expected behavior
the preview showing up just like in the nextcloud files

Screenshots
when clicking on a png in the public share

when clicking on a pdf in the public share

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrome and Firefox

Browser log

GET
[https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=/test.png&x=32&y=32&mimeFallback=true&v=865aa8&a=0](https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=%2Ftest.png&x=32&y=32&mimeFallback=true&v=865aa8&a=0)
[HTTP/2 200  119ms]

GET
[https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=/UAS-A1-A3-certificate-24852625.pdf&x=32&y=32&mimeFallback=true&v=aec5c0&a=0](https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=%2FUAS-A1-A3-certificate-24852625.pdf&x=32&y=32&mimeFallback=true&v=aec5c0&a=0)
[HTTP/2 200  122ms]

[WARN] viewer: No files provided, skipping update 
Object { app: "viewer", level: 2 }
[index.mjs:51:17](https://office.thesigmaarts.com/apps/viewer/node_modules/@nextcloud/logger/dist/index.mjs)
GET
https://office.thesigmaarts.com/apps/viewer/css/previewUtils-6cpbKhU6.chunk.css
[HTTP/2 200 OK 0ms]

GET
https://office.thesigmaarts.com/apps/viewer/css/NcActionButton-DyH89PpO.chunk.css
[HTTP/2 200 OK 0ms]

File info for /test.png fetched 
Object { filename: "/test.png", basename: "test.png", lastmod: "Sun, 02 Feb 2025 14:35:37 GMT", size: 2432463, type: "file", etag: "865aa866ccc7ae0107b0b3abe2119393", mime: "image/png", getcontentlength: 2432463, getcontenttype: "image/png", getetag: '"865aa866ccc7ae0107b0b3abe2119393"', … }
[Viewer.vue:668:1](https://office.thesigmaarts.com/apps/viewer/src/views/Viewer.vue)
GET
https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=/test.png&fileId=1273&x=1920&y=1080&a=true&etag=865aa866ccc7ae0107b0b3abe2119393
[HTTP/2 200  266ms]

[WARN] viewer: No files provided, skipping update 
Object { app: "viewer", level: 2 }
[index.mjs:51:17](https://office.thesigmaarts.com/apps/viewer/node_modules/@nextcloud/logger/dist/index.mjs)
File info for /UAS-A1-A3-certificate-24852625.pdf fetched 
Object { filename: "/UAS-A1-A3-certificate-24852625.pdf", basename: "UAS-A1-A3-certificate-24852625.pdf", lastmod: "Tue, 29 Jul 2025 13:51:56 GMT", size: 786444, type: "file", etag: "aec5c09c605ddef5191eeec8c894cec2", mime: "application/pdf", getcontentlength: 786444, getcontenttype: "application/pdf", getetag: '"aec5c09c605ddef5191eeec8c894cec2"', … }
[Viewer.vue:668:1](https://office.thesigmaarts.com/apps/viewer/src/views/Viewer.vue)
GET
[https://office.thesigmaarts.com/apps/files_pdfviewer/?file=https://office.thesigmaarts.com/public.php/dav/files/ey2MTWsYN3a2N5o/UAS-A1-A3-certificate-24852625.pdf](https://office.thesigmaarts.com/apps/files_pdfviewer/?file=https%3A%2F%2Foffice.thesigmaarts.com%2Fpublic.php%2Fdav%2Ffiles%2Fey2MTWsYN3a2N5o%2FUAS-A1-A3-certificate-24852625.pdf)
[HTTP/2 200  127ms]

Content-Security-Policy: Ignoring ‘x-frame-options’ because of ‘frame-ancestors’ directive.
Content-Security-Policy: Ignoring ‘unsafe-eval’ or ‘wasm-unsafe-eval’ inside “script-src-elem”. [files_pdfviewer](https://office.thesigmaarts.com/apps/files_pdfviewer/?file=https%3A%2F%2Foffice.thesigmaarts.com%2Fpublic.php%2Fdav%2Ffiles%2Fey2MTWsYN3a2N5o%2FUAS-A1-A3-certificate-24852625.pdf)
GET
https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015
Tracking

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015. (Reason: CORS request did not succeed). Status code: (null).

None of the “sha512” hashes in the integrity attribute match the content of the subresource at “https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015”. The computed hash is “z4PhNX7vuL3xVChQ1m2AB9Yg5AULVxXcg/SpIdNs6c5H0NE8XYXysP+DGNKHfuwvY7kxvUdBeoGlODJ6+SfaPg==”. [files_pdfviewer](https://office.thesigmaarts.com/apps/files_pdfviewer/?file=https%3A%2F%2Foffice.thesigmaarts.com%2Fpublic.php%2Fdav%2Ffiles%2Fey2MTWsYN3a2N5o%2FUAS-A1-A3-certificate-24852625.pdf)
GET
https://office.thesigmaarts.com/apps/files_pdfviewer/js/pdfjs/build/pdf.mjs?v=5.0.0-dev.0
[HTTP/2 200  38ms]

GET
https://office.thesigmaarts.com/apps/files_pdfviewer/js/pdfjs/web/viewer.mjs?v=5.0.0-dev.0
[HTTP/2 200  38ms]

GET
https://office.thesigmaarts.com/apps/files_pdfviewer/js/files_pdfviewer-workersrc.js?v=5.0.0-dev.0
[HTTP/2 200  26ms]

GET
https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015
Tracking

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015. (Reason: CORS request did not succeed). Status code: (null).

None of the “sha512” hashes in the integrity attribute match the content of the subresource at “https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c1241717689176015”. The computed hash is “z4PhNX7vuL3xVChQ1m2AB9Yg5AULVxXcg/SpIdNs6c5H0NE8XYXysP+DGNKHfuwvY7kxvUdBeoGlODJ6+SfaPg==”. [files_pdfviewer](https://office.thesigmaarts.com/apps/files_pdfviewer/?file=https%3A%2F%2Foffice.thesigmaarts.com%2Fpublic.php%2Fdav%2Ffiles%2Fey2MTWsYN3a2N5o%2FUAS-A1-A3-certificate-24852625.pdf)
XHRGET
https://office.thesigmaarts.com/apps/files_pdfviewer/js/pdfjs/web/locale/locale.json?v=5.0.0-dev.0
[HTTP/2 404  134ms]

GET
https://office.thesigmaarts.com/apps/files_pdfviewer/js/pdfjs/build/pdf.worker.mjs?v=5.0.0-dev.0
[HTTP/2 200  88ms]

Uncaught (in promise) SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

PDF 60bf8b3175d8934987028832f6262e25 [1.4 PDFsharp 1.50.5147 (www.pdfsharp.com) / PDFsharp 1.50.5147 (www.pdfsharp.com)] (PDF.js: 4.0.189 [50f52b43a])

if there's any steps i can do to help troubleshoot or other logs i need to share, then do tell

[kekkodance]

here's a debug log

DEBUG] systemtags: Hotkeys registered 
Object { app: "systemtags", level: 0 }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[INFO] viewer: 7 viewer handlers registered 
Object { app: "viewer", level: 0, handlers: (7) […] }
[index.mjs:48:17](https://office.thesigmaarts.com/apps/viewer/node_modules/@nextcloud/logger/dist/index.mjs)
[INFO] core: session heartbeat polling started 
Object { app: "core", level: 0 }
[index.mjs:48:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[DEBUG] files_sharing: Public auth prompt not shown yet but nickname is not mandatory. 
Object { app: "files_sharing", level: 0, nickname: "" }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[DEBUG] files: Rendered note-to-recipient FilesListHeader 
Object { app: "files", level: 0, header: {…} }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[DEBUG] files: VirtualList: resizeObserver updated 
Object { app: "files", level: 0 }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[DEBUG] files: Fetched contents 
Object { app: "files", level: 0, dir: "/", folder: {…}, contents: (2) […] }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[DEBUG] files: Directory contents changed 
Object { app: "files", level: 0, view: {…}, folder: {…}, contents: (2) […] }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
GET
https://office.thesigmaarts.com/apps/theming/icon/files?v=9524159b
[HTTP/2 200  106ms]

GET
https://office.thesigmaarts.com/apps/theming/favicon/files?v=9524159b
[HTTP/2 200  107ms]

[DEBUG] files: Updated note-to-recipient FilesListHeader 
Object { app: "files", level: 0, header: {…} }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[DEBUG] files: Rendered workspace FilesListHeader 
Object { app: "files", level: 0, header: {…} }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[DEBUG] files: Updated workspace FilesListHeader 
Object { app: "files", level: 0, header: {…} }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[DEBUG] files: SW registered:  
Object { app: "files", level: 0, registration: ServiceWorkerRegistration }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
GET
[https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=/test.png&x=32&y=32&mimeFallback=true&v=865aa8&a=0](https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=%2Ftest.png&x=32&y=32&mimeFallback=true&v=865aa8&a=0)
[HTTP/2 200  115ms]

GET
[https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=/UAS-A1-A3-certificate-24852625.pdf&x=32&y=32&mimeFallback=true&v=aec5c0&a=0](https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=%2FUAS-A1-A3-certificate-24852625.pdf&x=32&y=32&mimeFallback=true&v=aec5c0&a=0)
[HTTP/2 200  116ms]

Source map error: No sources are declared in this source map.
Resource URL: https://office.thesigmaarts.com/apps/text/js/_plugin-vue2_normalizer-wd1ZAbRr.chunk.mjs
Source Map URL: _plugin-vue2_normalizer-wd1ZAbRr.chunk.mjs.map

[DEBUG] files_sharing: Ignoring duplicated navigation from vue-router 
Object { app: "files_sharing", level: 0, error: NavigationDuplicated }
​
app: "files_sharing"
​
error: NavigationDuplicated: Avoided redundant navigation to current location: "/ey2MTWsYN3a2N5o?dir=/&editing=false&openfile=true".
​
level: 0
​
<prototype>: Object { … }
[index.mjs:45:17](webpack:///nextcloud/node_modules/@nextcloud/logger/dist/index.mjs)
[INFO] viewer: Opening viewer for file  
Object { app: "viewer", level: 0, path: "/test.png" }
[index.mjs:48:17](https://office.thesigmaarts.com/apps/viewer/node_modules/@nextcloud/logger/dist/index.mjs)
[WARN] viewer: No files provided, skipping update 
Object { app: "viewer", level: 0 }
[index.mjs:51:17](https://office.thesigmaarts.com/apps/viewer/node_modules/@nextcloud/logger/dist/index.mjs)
File info for /test.png fetched 
Object { filename: "/test.png", basename: "test.png", lastmod: "Sun, 02 Feb 2025 14:35:37 GMT", size: 2432463, type: "file", etag: "865aa866ccc7ae0107b0b3abe2119393", mime: "image/png", getcontentlength: 2432463, getcontenttype: "image/png", getetag: '"865aa866ccc7ae0107b0b3abe2119393"', … }
[Viewer.vue:668:1](https://office.thesigmaarts.com/apps/viewer/src/views/Viewer.vue)
[DEBUG] viewer: Fetching additional files... 
Object { app: "viewer", level: 0 }
​
app: "viewer"
​
level: 0
​
<prototype>: Object { … }
[index.mjs:45:17](https://office.thesigmaarts.com/apps/viewer/node_modules/@nextcloud/logger/dist/index.mjs)
GET
https://office.thesigmaarts.com/apps/files_sharing/publicpreview/ey2MTWsYN3a2N5o?file=/test.png&fileId=1273&x=1920&y=1080&a=true&etag=865aa866ccc7ae0107b0b3abe2119393

[kekkodance]

nevermind, it was my fault.

in the custom css i had a rogue rule:

#body-public #viewer .main-nav {display:none;}