Failed to load PDF file

[Freak-On-Silicon]

Hi;

I installed BentoPDF with the Proxmox Helper Script.
All was good until a couple of weeks.

Now i get a "Failed to load PDF file." Error wenn uploading an PDF

Tested multiple PDFs.
Uploading an Image is working.
I have enough space.

What can I do?

[dkutan]

I have the same issue since last update, I am running it behind cloudflare tunnel.
It stopped working after update because it stopped listening to HTTP and would redirect to HTTPS.
I changed my cloudflare tunnel to HTTPS, now the main page works but any uploads no longer work.

[alam00000]

qutebrowser/qutebrowser#8859

This issue probably comes from our pdf.js update. In recent updates, they removed polyfills to make it compatible with older browsers

[alam00000]

I suggest updating your browser to the latest version and trying again. Let me know if it still does not work

[Freak-On-Silicon]

Version 2.8.4
no, but when i use one (caddy) i get an 400 Bad Request, but thats another problem

[alam00000]

To help me pin down the cause:

Open BentoPDF in Chrome or Firefox where you see the error
Press F12 to open Developer Tools, click the Network tab
Reload the page (Ctrl+R / Cmd+R)
You'll see a red/failed row containing pdf.worker.min and ending in .mjs — click it

In the panel that opens, find Response Headers and look for the line starting with content-type:
Send me a screenshot of that
Thanks!

[Freak-On-Silicon]

[alam00000]

Your nginx is serving the .mjs PDF worker file as application/octet-stream (the Proxmox helper script's MIME edit doesn't take effect on all installs), which the browser refuses to execute as an ES module

A quick fix:
run sudo sed -i 's|application/javascript\s\+js;|application/javascript js mjs;|' /etc/nginx/mime.types && sudo systemctl

reload nginx inside your container a permanent fix that bypasses this entirely is shipping in the next BentoPDF release.

[Freak-On-Silicon]

your fix only lists the services?

Maybe like this?:

sudo sed -i 's|application/javascript js;|application/javascript js mjs;|' /etc/nginx/mime.types
sudo systemctl reload nginx

but i see that nginx isnt running

i will wait for the next release.

Big thanks to you!

root@bentopdf:~# systemctl status nginx.service
× nginx.service - A high performance web server and a reverse proxy server
     Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; preset: enabled)
     Active: failed (Result: exit-code) since Sat 2026-05-09 12:54:47 CEST; 33s ago
 Invocation: d15a215dca2f40258b17952488db4bd5
       Docs: man:nginx(8)
    Process: 416 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
    Process: 419 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=1/FAILURE)
   Mem peak: 2.1M
        CPU: 22ms

May 09 12:54:45 bentopdf nginx[419]: nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)
May 09 12:54:45 bentopdf nginx[419]: nginx: [emerg] bind() to 0.0.0.0:8443 failed (98: Address already in use)
May 09 12:54:46 bentopdf nginx[419]: nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)
May 09 12:54:46 bentopdf nginx[419]: nginx: [emerg] bind() to 0.0.0.0:8443 failed (98: Address already in use)
May 09 12:54:46 bentopdf nginx[419]: nginx: [emerg] bind() to 0.0.0.0:8080 failed (98: Address already in use)
May 09 12:54:46 bentopdf nginx[419]: nginx: [emerg] bind() to 0.0.0.0:8443 failed (98: Address already in use)
May 09 12:54:47 bentopdf nginx[419]: nginx: [emerg] still could not bind()
May 09 12:54:47 bentopdf systemd[1]: nginx.service: Control process exited, code=exited, status=1/FAILURE
May 09 12:54:47 bentopdf systemd[1]: nginx.service: Failed with result 'exit-code'.
May 09 12:54:47 bentopdf systemd[1]: Failed to start nginx.service - A high performance web server and a reverse proxy server.

EDIT: its working now!!
the nginx service isnt startet, still its working

[dkutan]

resolved my issue as well, thank you alam00000.