Cannot upload or move file to folder if file with that name exists

Expected behaviour

When I’m uploading files to a folder where a file with that name already exists one of the following should happen:

1. Overwrite the existing file and keep the overwritten file in the history.(I think this was the default behavior in previous versions)
2. Reject the upload with a message that tells me that the file already exists.
3. Show a dialog where I can choose from different options (overwrite, cancel, rename).

Actual behaviour

I get an error message that says: “Error photo/Video not found, remove from upload”
This is in a number of ways inappropriate:

1. My language is set to German but the error message is in English
2. I was trying to upload a pdf file, not a video or a photo
3. The message is very misleading, you wouldn’t expect that it is caused by an existing file.

When I am moving files within the app a correct error message (file exists) is shown which is fine. However I would still prefer behavior 1. or 3.

Steps to reproduce

Upload the same file twice to the same folder.

iOS version

11.4.1

App version

2.22.2.2

Server configuration

Operating system: Ubuntu

Web server: Apache2

Database: MySQL

PHP version: 7.2.10

Nextcloud version: (see Nextcloud admin page)13.0.6

Reproduce by uploading the same PDF twice to the same folder on the reported app and iOS versions, then compare the upload failure with the existing move-file error. The issue names no files or tests, so trace the iOS upload path first. Done means the duplicate-file case has an agreed behavior and produces an accurate, localized result rather than the misleading photo/video message.