Hi,
During our tests we did not notice such error on macOS Catalina, but it can be caused by fact that we have tested clean Publii installation.
Please follow this guide: https://nektony.com/duplicate-finder-free/folders-permission
We will try to find a solution how to display dialog with ask for access permissions to avoid this error and we will publish it as Publii 0.35.2.1
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