Can't install story format

[codetyper]

I've been install the fresh version of Twine 2.1.2 x64 on Windows 10 x64.
When I tried to install story format I've got this error:

The story format at https://cdn.rawgit.com/Longwelwind/adventures/master/dist/format.js could not be added (Timeout).

Same on Ubuntu 16.04.06 x64 and all of web versions.
Also, I tried to install local versions from C:\format.js and got the same error.

Twine 2.3.0b2 can install this story format correctly, but this version can't run example from here:
https://raw.githubusercontent.com/Longwelwind/adventures/master/examples/complete-tutorial.html

This software looks buggy. It dissapointed me.