New UI alerts need better summaries

In the above screenshot: (a) which path needs to start with a foward slash, and (b) what error occurred?

If I click on the message, it should show the full text of the alert, not remove it from the list.

Sorry, I forgot to mention that I’m running Duplicati 2.2.0.2 - 2.2.0.2_beta_2025-11-26 on EndeavourOS (a variant of Arch Linux)