adobe flash player download

That's really odd.  Are you using any ad-blocker or anti-tracking plug-ins that would interfere with how JavaScript on the page operates?

If not, I'd like to know more about your configuration so that I can follow-up on it:

https://forums.adobe.com/message/5249945#5249945

Regardless, the offline installer should get you around this:

Windows:

Internet Explorer:

http://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player_ax.exe

Firefox and other NPAPI browsers:

http://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player.exe

Mac:

http://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player_osx.dmg