It may be something about the intended processor.The YT tutorial uses the Nucleo STM32L07RTZ board. I just ran a test set-up for generating the initialize code for the "blue pill" STM32F103C3T6. Imported just fine into STM32CubeIDE. I'll try again ...

Same problem, with STM32CubeMX (5.3.0) and STM32CubeIDE (1.0.2_3566_20190716-0927). After generating code, and clicking on "open project" I have that "please install" error. However, the project can be imported to the IDE, and opened that way.Can we ...