Project>Build Project greyed out/nonfunctional

[RPasc.2]

Why does this happen ? Could this, in part, be due to me not knowing whether to choose "new C project" vs "new C++" project?

Using:

STM32CubeIDE 1.5.1

Build: 9029_20201210_1234 (UTC)

OS: Windows 8.1, v.6.3, x86_64 / win32

Java version: 1.8.0_272

[TDK · Accepted solution]

You should be doing "New STM32 Project".