Is the install reliant on e107.org/themes being available?
No it is not, as all needed, is on the (zip) pack.
Note: when running admin it will try to contact the e107 server for latest update availability and messages on plugins/themes/news
To be sure i downloaded the latest Xampp and installed...I do have to asume you are aware of the folowing points (these become more important since the serverpacks are being rewritten to comply with newer php versions..) >
Visual Studio C++ 2017 aka VC15
Be sure !! that you have installed the latest C++ Redistributable Visual Studio 2017 : vc_redist_x64 or vc_redist_x86 (updated 5 December2017).
(php info page third line : Compiler MSVC15 (Visual C++ 2017) !!! (is it there?) Although compat with VC14 should exist...carefull... (so it is for xampp and also wamp).: here's my info:
Version 2.1.8 (git)
Bootstrap 3 v1.0 by e107 Inc (2013-12-25)
Sunday 18 February 2018 - 13:22:48 (actual time is for me +1 hour) server time
Apache/2.4.29 (Win32) OpenSSL/1.1.0g
Sun, 18 Feb 2018 13:24:09 +0000
As you can see it is created just before this posting, and i have NO issues whatever.. It installs (about 3-4 minutes). Posting here time +/- 14:35 (13:35 +1)
No settings changed, using all fresh without any extra things.. Install xampp, create folder in htdocs (e107 is unpacked), run install > done...
One confession to take into consideration : i do not know if the new Xampp has VC15 build in, as i already had it installed on my pc