Staging currently 3.7.0 beta 3 ... also 3.6.5. Several users have also reported a similar issue https://forum.joomla.org/viewtopic.php?f=708&t=947822
Tested on localhost xampp
PHP Built On Windows NT MY-COMPUTER 10.0 build 14393 (Windows 10) i586
Database Version 5.5.5-10.1.16-MariaDB
Database Collation utf8_general_ci
Database Connection Collation utf8mb4_general_ci
PHP Version 7.0.9
Web Server Apache/2.4.23 (Win32) OpenSSL/1.0.2h PHP/7.0.9
WebServer to PHP Interface apache2handler
Joomla! Version Joomla! 3.7.0-beta3 Beta [ Amani ] 21-February-2017 15:03 GMT
Joomla! Platform Version Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
This is usually caused when your host has an outdated SSL library it fails to authenticate the Install from web SSL Cert.
Not really an issue but a server configuration issue.
If it was ssl cert problem then why does it work when navigating away and back again ?
Well then that's not an SSL error. But you haven't stated it does that in your issue, hence my point 'Usually'. And I didn't look at the forum post.
Sounds like a possible cache issue and reading on the fly on windows systems maybe but just a guess. I've asked on the forum for more details from the other users to.
My best guess is cache but this is probably one that will be hard to locate so maybe not worth the bother of chasing to far ?
there already opened issue for it, cannot find
the problem with the tabs ordering,
the "install from web" expect to be in hidden tab
|Closed_Date||0000-00-00 00:00:00||⇒||2017-03-20 02:43:07|