To clarify, is the issue that a popup appears at the bottom of the web UI screen, yet logs don’t indicate why?
FYI the forum software will allow pasting screen clips (if you’re able to take them), and these can add clarity.
Helpfull message box [feature request] #2887 and Feature request: better reporting give possible changes.
Strange warnings after update to Duplicati 2.0.3.4_canary_2018-04-02 discusses checking various log files because they’re kind of spread around right now… I can’t tell you what you’re missing, but you could check.