"files not included due to access errors" - how to find them?

How can I find the “not included” files?
These posts ask the question, but no answer was found:
https://forum.duplicacy.com/t/file-was-not-included-due-to-access-errors-but-no-log-of-it/4103
https://forum.duplicacy.com/t/how-to-determine-which-files-have-access-errors/1159

and where is the “log file”? is it the CLI output?

Running Duplicacy CLI v 2.6.2 on Ubuntu 18.04.5

If you scroll up the output you’ll see messages like Failed to open file for reading for each file or directory that can’t be opened.