Electron not recognizing SINGLE_THREADED_BLOCK()

[ScruffR]

Same reason as in this thread

TRY_LOCK was not declared in this scope WITH_LOCK was not declared in this scope

0.4.8 does in fact include the full multithreading code on the Electron, but the stack size was too small, leading to random code crashes after connecting to the cloud via UDP, which is why we were saying that multithreading wasn’t supported in 0.4.8 on the Electron. 0.5.0 fixes this.

Since it's not officially supported on Electrons you might experience things like this.