Unable to move or time-shift

Hi. I’ve been using Audacity for a while and I love it. But for some reason, two days ago (after downloading the latest update) I lost the ability to move a part of a track to better sync-up the sound with existing tracks.
I right click to split, as always. Then after left-clicking to Left-drag the selected segment, it refuses to move. I also cannot lengthen a selected track section (though it still allows me to shorten one).
What happened?

I replied here: https://forum.audacityteam.org/t/where-did-it-go/63304/5
(please avoid double posting :wink: )

Try selecting all track go to tracks>align>align end to end

This will organize tracks so when one finishes next one begins.

Hope I am understanding your question