Not just the compiler, the export is not working either.. exported project cannot be compiled if you don't change the makefile.
Cloud IDE compiler is not so impressive..
The problem is you cannot easily download the mbed library without downloading and compiling 1000 (exaggerating) other tools.
Your project can suddenly stop working after releasing a new mbed-os.. That happened with me many times.
At the moment, I cannot use the new MBED with the SDblock library included. It was working just fine when the sdblock library was a separate library.
Reporting the issue, will not solve your problem either ..
Same here, cannot compile anything.