Many months I was able to get mbed-dev with no problem but now neither method works. Is there anyone in charge who knows why there are problems with getting mbed-dev?
I tested and noticed that import as program failed and is not possible as library.
mbed-dev is library source for Mbed OS and not probably for import to Online compiler as it is.
Problem might be because it seems to be Mbed OS 2 version. I recommened to try Mbed OS 5 instead.