JabRef 5.2--2020-09-02--5c9edc9
Linux 4.9.0-13-amd64 amd64
Java 14.0.2

• Mandatory: I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

Drag & drop of a PDF file (to create a new entry) does not work if the library file has no entry.

Steps to reproduce the behavior:

1. Menu File --> New library (the table entry space displays "No content in table")
2. Drag & drop a pdf file in the entry table space.
   Nothing happens