we work on computers running Apple OS BigSur and using Indesign 2021 (16.1) - All is updated.
The problem is that we cannot download licensed picture directly from the library in place of low resolution one (no error message). Dowload directly from the website AdobeStock works, it is ok also on
older computers using an older AppleOS (10.14 or 10.15) from the library.
I mean it is probably an Indesign bug linked to BigSur.
With Photoshop 2021 update, when you search the Library for stock a separate discover window opens, scroll to stock click and it opens to the web. Search from there and if you like a photo you can add it to your library at that point. Then it will stay the library for your future use.