I have this problem with the setup of Android SDK in Virtual Studio Community 2015. Whenever I try to install or repair VS, I always get problems with the setup of API Level 19 and 21,21 and 23. It always says that the packages were not downloaded and I should check my internet connection. However, my internet connection is working perfectly. I have seen many other users having similar problems, but none of the proposed fixes work for me. I have reinstalled VS twice and repaired it like 3 or 4 times. I checked my Java version and my proxy settings or tried installing them via the Android SDK Manager/alongside Android Studio. So far without any luck. I hope I have not overseen any fixes.
Unfortunately, the log is very long, so I can´t post it here (if you have any suggestions where I can post it, please tell me!). In the links you will find two screenshots of the error message I get.
Can you help me?