Are you using any proxy server?
Please upload the two log files, Adobe_ADM.log and Adobe_GDE.log saved at ~/Library/Logs/Adobe_ADMLogs (this is the User's Library directory, not the system Library directory) to cloud.acrobat.com.
Please read the following instructions on How to share a document.
I too have this problem (at least would appear to be the same failure).
I've upload the file at Shared Files - Acrobat.com
I tried all the troubleshooting step, including uninstalling Flash.
A re-install failed, even after a reboot. So now I have no flash player and can't read BBC News articles!
Not Happy :-(
Is your user ID a member of the wheel group? You can check the same, just open Terminal, type id then hit enter. The output will list your userID, what group(s) it's a member of and a number of other items. Is (wheel) there in the output?
If it is there, it is already a known issue when Flash Player is installed using the online installer and are working on fixing this bug. For now, you can use the offline installer posted at the bottom of the Installation problems | Flash Player | Mac page in the 'Still having problems' section.
I was having the same problem with 10.11.6 yesterday. Because I had a different problem as well, I followed the instructions to fix that one and when I did, the flash installed immediately unlike the multiple failures the day before. Perhaps the same steps will assist you.
1. On stat up hold command + R until you get Mac Recovery mode.
2. Open the Utilities > Terminal
3. type in:
When I did this the CoreTelephony issue disappeared and so did the Flash installation from the install_flash_player_osx.dmg
If there's something in the temp file that is causing this for you, then this could help.