Currently the version of compiler is fixed to 0.4.24 and following the tutorial results in error:
contracts/CounterApp.sol:1:1: SyntaxError: Source file requires different compiler version (current compiler is 0.4.26+commit.4563c3fc.Emscripten.clang - note that nightly builds are considered to be strictly less than the released version
Currently the version of compiler is fixed to 0.4.24 and following the tutorial results in error: