There is an error - Argument #1 ($directory) must be of type string, bool given in scandir() when trying to access a non-existent folder.
Steps to reproduce:
1. Add $settings['file_private_path'] = '../private/files'; setting to settings.php file.
2. Select the 'private' option for the 'File system path' field on the /admin/config/system/auditfiles page.
3. Remove the 'files' folder.
4. Go to /admin/reports/auditfiles/notindatabase page.
Active
4.2
Code
Hi, I just tested !MR 41 on my local D10.4 site. On the final step (Go to /admin/reports/auditfiles/notindatabase page) my Brave browser took a few page refreshes before showing the expected behaviour. +1 for RTBC