I have configured "allow users to upload any file"
I might be wary of allowing users to upload any type of file. Might suggest you restrict this a bit more unless you have a real use case for any and all file types, sans any restrictions. ✌
File = 1,69 MB
Have you tried changing the client_max_body_size in nginx?
Even though the default is 2MB, the actual data being transferred may be over that for the file you are uploading. Try 4MB.
@yariplus ha-ha, yes. It was in this. Now everything works fine, thank you!