When importing from a CSV file that was exported from LastPass, the error message caused by too-long Notes is not stable, i.e., does not stick around until the user is finished referring to it.
Any attempt to select the error message with the intention to copying it to the clipboard causes it to disappear.
Touching anywhere else on the browser tab with the mouse causes the error message to disappear.
If I am extremely careful to never touch anywhere else on the browser tab, the error message sticks around for some time. Then eventually it spontaneously disappears.
The error message should be made more stable, so it remains on the screen until explicitly dismissed, and should be made copiable to the clipboard for longer-term storage.
It’s highly desirable that all text ever displayed be always able to be copied to the clipboard.