file uploaded with length 0

Expected Behavior

The complete file is uploaded

Actual Behavior

A share is created and a file with the length 0.

Steps to Reproduce the Problem

1. create an attachment with FileLink
2. click the Upload button to upload to Nextcloud

Specifications

• Platform: Ubuntu 20.04 LTS
• Thunderbird Version: 91.5.0
• Addon Version: 3.13.0

If you have the same problem

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The server is based on NextCloud 22.2.3. I don't have a quota.

There is no error on the console and the upload appears to succeed.