Conor,
Photo Mechanic log attached. See if there is anything in it that can clear this issue up. If not, I will contact support. I am not on a trial version as I took out a license last year.
Please do the following:
1. Quit out of Photo Mechanic
2. Open up the macOS System Preferences and go to "Security and Privacy"
3. Under the Privacy tab, select 'Full Disk access' on the left hand side
4. Click the padlock in the bottom left to unlock it
5. Enter your administrator password to be able to make changes
6. Find Photo Mechanic in the list on the right and check the box next to it
7. Close the System Preferences window
Then try your Ingest again. If it still isn't successful, please contact support.
Thanks,
-Kirk