This article explains how to get the crash log file for PDF Viewer for macOS.
To send us the crash log you first need to locate the file. This is very easy, just follow the path below, replacing "YourName" with the username on your Mac:
In this folder, search for "PDF Viewer" and take the crash log that fits the date and time of the crash.
The filename will look similar to this:
Once you located the file, send it to us via the in-app support (Help > Support) by attaching it to your message.