No default toolchain configured after installing rustup

I installed Rust using rustup, but when I try to enter a Rust command like cargo or rustc in my console, the following error appears:
error: no default toolchain configured


Is this a known issue?

If it seems that rustup did not successfully install and configure the stable toolchain, you can do it manually:

rustup install stable
rustup default stable


After testing, it seems like my incomplete installation may have been caused by a network error. You can also try to reinstall to solve the problem.

Stack Overflow Q#44303915, score: 348