Nginx: Error 404 when uploading file

I'm using Grav with Nginx. My issue is that I keep getting an error when I upload a file in a form.

I checked the Nginx error log file, and it seems the problem is where it's trying to temporary upload the file.

2023/12/20 12:46:40 [error] 42123#42123: *540 open() "/home/grav/www/html/fr/test.json/task:file-upload" failed (2: No such file or directory), client: xx.xxx.xx.xxx, server: localhost, request: "POST /fr/test.json/task:file-upload HTTP/1.1", host: "xxx.xxx.xxx.xxx", referrer: "http://xxx.xxx.xxx.xxx/fr/test"

However, the path /home/grav/www/html/fr/test.json/ doesn't exist in my Grav arborescence.

If it helps this is what the console shows :

With the issue being this part of the form.vendor.js in /home/grav/www/html/user/plugins/form/assets

{
 key: "submitRequest",
 value: function(e, t) {
    e.send(t)
}

I've looked around but can't seem to find a solution online.

Thank you : )

@douxdoux-1312, Can nginx write to /tmp?

Using Apache, when I do a chmod -w /tmp I get the following error:

Failed to load resource: the server responded with a status of 500 (Internal Server Error) typography.json/task:file-upload:1

The error happens when dropping a file in the Dropzone.

By the way, typography.json/task:file-upload:1 does not exist. It is a virtual path which is caught by the Form plugin when dropping a file in Dropzone. Form plugin will then save the file in /tmp/form/.... When submitting the form, Form plugin will fetch the temp file and store it in the destination of the File field.

Thanks for the clarification! Do you mean my nginx droplet main /tmp file ? I gave full permission to this one, plus the /home/grav/www/html/tmp. I also tried switching ownership of /tmp from root:root to grav:grav, but the issue persists.

I'll keep digging, but if you have more ideas I'll be happy to try different avenues : )

@douxdoux-1312, With /tmp I meant the folder inside Grav next to /user.

Sorry, I have no experience with nginx. But my gut feel is that Grav with nginx is more problematic then Apache.