Can't see thumbnails in timeline.
I’m running Premiere in macOS Big Sur (v. 11.2.3). Suddenly, in the app, I can no longer see the thumbnails of my clips in the timeline of any sequence. This is the case with all sequences across different Premiere projects. This has never happened to me before.
I tried clicking on the hamburger menu for a given sequence, then selecting each of the three options for the display of thumbnails (e.g., Video Head Thumbnails), but that didn’t change anything. I just updated to the latest version of Premiere (15.1.0); still no resolution.
What happened and how do I resolve it?
