Interrapt G31

Environment:
IPhone 13 Pro Max
Safari iOS Version 17.4.1
https://qainterrapt.brainster.xyz
Page zoom: 100%

When we attempt to download selected webinars from download button displayed message on the screen 500 SERVER EROR.

Steps to reproduce:
1. Navigate to URL : https://qainterrapt.brainster.xyz
2. Navigate to Log in page
3. User should be successfully logged in.
4. Click on the 'Attendees' from 'Hamburger' menu.
5. Select attendee profile.
6. Click on download button
7. Click on 'Selected' from download drop down field of download button.

Expected result:
Download button should be download all or selected webinars.

Actual result:
Download button is clickable but when we select attendee profile and than click on 'Selected' button from drop down field of download button, displayed error message: 500 SERVER ERROR