Error on shutdown

[mjdbb1]

Describe the bug
I'm getting an error when I shut down the PC after the program has been running for a while (seems like it happens after it's been running for a couple of hours).

To Reproduce
Steps to reproduce the behavior:

1. Wait for the screensaver to appear.
2. Let it run for a couple of hours (seems to be at least 2 hours in my case)
3. Move the mouse to end the show and shut down the PC. Error appears.

Expected behavior
Shouldn't have this exception error (see screenshot).

Screenshots

Aerial Version
1.2.1 (NOT .scr version)

Additional context
Happening on both a Windows 11 and a Windows 7 pc.