Apostrophe 2.106.1 has been released, fixing a regression that occurred in the “Manage Images” view. Thumbnail images now appear properly again in that view. Thanks to thesim333 for pointing out the issue.
This is a followup to Apostrophe 2.106.0, which was an important security update, so you should definitely upgrade to 2.106.1 whether you installed 2.106.0 or not.
The easiest and recommended way to upgrade is to type npm update in your project folder.